In 2013 US government receipts totalled $2.78tn of which corporation tax constituted $273bn (~9.9%)[1]

I imagine most of the boost in margins to be brought down increasing compensation or numbers employed so most of that gets brought in to tax coffers via personal income taxes.

[1]http://www.taxpolicycenter.org/taxfacts/displayafact.cfm?Doc...

The US is solvent either way because it is sovereign in its own currency. It cannot physically run out of dollars.

The low corporate tax rates do not hamper the government's ability to spend, but they are inflationary (in a limited sense). The price of investment goods (property, shares, etc.) is driven way, way way way way up because most of the dividends are simply reinvested.

It drives up wealth inequality as well.

They waste a lot of money setting this all up, changing it all around when policy changes, paying armies of lawyers, not to mention the liquidity problems I mentioned. Sure they "own" the money but it's stuck outside of the USA.

Edit: how do they stay solvent now, when the money is periodically re-imported during tax holidays?

Put a small import tax on to pay for the court system & a reasonable amount of police / military. Then fold the rest of the business up.