tbf, the Boxer is a pretty wide family of vehicles, so it includes both APC and IFV variants (as well as a whole bunch of other stuff, like engineering vehicles, mortar carriers, artillery, recovery vehicles, SPAAGs...). It's more comparable to the ZBL-08, which similarly has many variants, and sits at 6K+ (and is a much lighter and more economical vehicle).
But even still, 5K is a ridiculous number. West Germany, during a much more militarily tense period, had around 2.1K tracked IFVs and 1K wheeled APCs, supplemented by 4K M113s (which I think they imported from the Americans rather than produced under license, and probably for pretty favorable prices given how the yanks were handing out 113s like candy). An now they're aiming for maybe up to 600 Pumas (one of the fanciest and most expensive modern IFVs) plus all these Boxers, and tanks, and a whole bunch of other stuff. And all this as their economy is shrinking, especially in the manufacturing sector that's supposed to actually produce all this shit.
This is basically all of European rearmament, just governments saying "we've just put in an order for ONE BILLION TANKS" 
and everyone clapping like seals at based Europe standing up to
and no one bothering to interrogate if any of this is even remotely financially feasible (or just, like, materially feasible, as in "even with an infinite money cheat, are there physically enough factories that this order could be fulfilled anytime this century?")




um actually the US says that only a few Ukrainians have died (based on propaganda fed to them by the Ukrainians)
https://archive.ph/fnLNN
more
Northrop, btw, didn't really win any sort of competition, they were literally the only choice (I guess "the other competitor dropped out before we got to the actual competition" sort of counts as winning)