I'd suggest adding:

• Establish new "Common Ground" party with a platform mandated to only reflect issues and positions with a 2/3rd majority support among the American public in multiple 3rd party polls from different pollsters

Political ideology falls along a normal distribution. Very dumb to draw the line down the middle rather than capturing the norm and excluding the edges.

Let's have progress demand a shift in the national attitudes over time rather than let minor shifts of a few percentage points every few years in a deadlock determine progress or regress.

From an outsider perspective. Two houses/chambers are better than one. But the second should be a review chamber that sends amendments back to the first. If those amendments are rejected by the first then so be it.

Something like PAYE would be better than having your government work out the tax. It places the expanse on the companies rather than the government or the individual.

With a less convoluted tax system and businesses working it out you probably wouldn't need to ban those tax companies as market forces would make them no longer viable.

VAT should be on luxury goods, and ones that the government wants to discourage the use of for public health (500% vat on tobacco products, 300% VAT on vaping etc).

Just add tax brackets up to 99% and have graduated lending taxes

You've got huge, earthshaking, constitutional-level changes here lumped together with minor stuff like tax-prep and tax brackets. There's no sense of scale here. (Also, forget tax increases, implement a wealth tax)

• Introduce a corporate death penalty for grave offences: a business is declared bankrupt and sent in to liquidation even if it is financially sound.

Abolish corporate personhood? No. Someone obviously doesn't understand what corporate personhood is or how it exists.

If there is no such thing as corporate personhood, how do you tax a corporation? How does a corporation own any property? How does a hospital exist? How do groups of people pool capital? How does one sue groups of people who have pulled their Capital and caused harm?

The jurisdiction of all law is based on personal jurisdiction. Corporate personhood is considered a "legal fiction," it doesn't exist to protect corporations, although it sometimes does, it exists by necessity and by operation of law. It would exist even if you didn't want it to, it would just have to be called something else. The alternative is that groups of people cannot pool resources toward a common endeavor, or, they can, but it's a lawless and ungovernable enterprise, with nobody having any enforceable rights.

....

House and Senate merge? No. Read up on bicameral versus unicameral legislative power as limitations on power, and in America the Senate's role as a saucer. It makes sense especially when the Congress is a huge body to begin with and when dealing with classified information and covert matters of state; in which case a higher tier with a smaller group and longer terms makes sense to protect our secrets.

This is the also the only idea, along with Supreme Court term limits, that requires a Constitutional Amendment. The others are much more feasible and reasonable. ...

TIL america has a VAT..?

But yeah, other than that, this list makes too much sense for most people. they will shit on it because 1) they have no imagination and 2) they don't have enough knowledge to see that each point actually has a reason and seems to have been given a fair amount of thought

You want a really ambitious one that would help, abolish the states.