You don't have to look too far. It's exactly what proponents of that "wunderwaffe economic miracle drug" MMT, unknowingly or otherwise, is advocating whenever it's brought up here.
As I’ve seen it articulated, the problem with MMT is precisely that it’s the modern equivalent of 19th century takes like “This is how you can make the British Empire work to help you!”. It’s the contemporary “FDR New Deal” faustian bargain meant to co-opt the Western left and even the PatSoc chauvinists towards pursuing not any economic alternatives like socialism but an ever more perfect capitalism. There was a struggle session a while back when Roderic Day dunked on the Deprogram co-host JT for a pro-MMT video, which got the latter’s subscribers very upset. I’d actually recommend that JT video for a model representation of how MMT sells itself to the Western left. It’s “rational” and “logical.” All upswing and couched in enough Keynesian economic jargon that the only comprehensible issue with it to the general viewer seems to be just that “the greedy Western political leadership simply don’t want to share the pie,” thus blocking its enactment.
What goes unsaid is that the entire substructure which MMT rests upon is that of American dollar hegemony. The policies of MMT can only function in a jurisdiction where the imposition of such autarkic currency sovereignty can effectively ignore counter-threats of credit ratings downgrade, sanctions, divestment, IMF and World Bank condemnation and all consequential fallout with impunity. The only jurisdiction capable of that, perhaps even in the entire West, is the US alone, through the half century of work it’s done in solidifying its financial hegemony.
When non-imperial core (or wannabe imperial core) countries try to enact it, like Greece under Varoufakis era of the early 2010s, it was condemned by the ECB and the rest of the EU Troika. Greece succumbed to those political pressures, reversed its tracks and instead embarked on typical IMF-proscribed austerity SAPs. The standard of living has subsequently never recovered with current GDP per capita only approaching early 2000s levels.
As such, not only is MMT agnostic of its own basis on the bedrocks of American financial imperialism but it further advocates for the preservation of the current status quo of dollar hegemony through its proposal to trickle down some dividends of that system to the (exclusively American) working class. Therefore, its aim seems to be reeling in those of the tendency in the Western left that drifts towards the “socialism is the best way for gains to be distributed for me personally” in-it-for-myself sentiment rather than those of the anti-imperialist or socio-political bend of Western leftists.

Well it has to do with the physiological afflictions that affect the skeletal structure of a comprador's body. Per the Cleveland Clinic:
In seriousness, the current South Korean leadership won its current position from a 0.73% margin in a 2022 election, largely through inflaming the South Korean societal gender antagonism, where they stood on the side of misogyny. Being carried into the Seoul presidency by incels, Yoon then proceeded to spend the majority of his time on foreign affairs, because the internal contradictions of South Korean society are simply insurmountable for President Incel to solve, whereupon he capitulated on all the historical grievances that previously prevented a South Korean junior partnership to Japan, like abandoning comfort women victims and allowing Japanese military stationing in South Korea. The point is to create a fait accompli of irreversible South Korea-Japan ties to bind South Korean foreign policy to the US in the New Cold War that any successor in Seoul would be unable to undo and therefore forced to abide to. Given that it was reported just today that his approval rating is at 20% and the same survey reported that "66 percent said South Korea should only provide nonlethal military assistance, such as medicine and food, to Ukraine," I'd imagine he's leaning all-in on foreign policy compradorism, by flouting the charade of South Korean "democracy," as a means of carving out some semblance of a personal political legacy.
To be honest, this has parallels to the original Cold War. Helmut Kohl of the 1980s in the BRD was exactly this sort of bumblng blowhard. A wannabe Reagan and Thatcher two-for-one in Bonn, yet powerless to do anything for resolving BRD domestic conditions. He turned his attention then to foreign policy, aligning the BRD as a vassal to Reaganite geopolitical interests and tanking Ostpolitik with the DDR, similarly to how the current Seoul regime has destroyed the detente with the DPRK created by the Moon administration. Ineffective - until Gorbachev came along and sold out the DDR so that Kohl got to claim the "honor" of becoming the first chancellor of a "unified" Germany. In that instance, in terms of the narcissistic politician's desire to secure a historical legacy, being a comprador to US geopolitical interests "paid off," as repulsive as it is to admit.
In a larger sense, you could say that everything which the current historically unremarkable generation of leadership in both the West and its vassals like South Korea are doing resolves around clinging to the same hope, which in a macroscopic way helps to explain moves like this. They think they are on the winning team and therefore the only important thing to do is securing their number on this team. It's akin to the doctrine of "proleptic eschatology" in Christian theology, where everything being done in the present is rationalized for the anticipation of the "second coming." In this case, the "second coming" is that of a new Gorbachev figure who will deliver the West the victory to this New Cold War. The lesson they think they've learned from the original Cold War is that material conditions are fundamentally secondary in principle and irrelevant in practice: they don't need to concede anything or "waste their time" resolving immense domestic contradictions or compromise with "the adversary" because a Gorbachev will inevitably come along to hand them the keys to the entire house once again and elevate their names into the history books like what happened to their predecessors.