People said the same when the $100K fee for H1b was introduced, and said that the US won't be able to fill the 85,000 spots. But there were 211,600 applications in the last cycle.

Also, your other 'facts' are incorrect. The US for example has the highest amount of disposable income per family, has a lower tax burden (despite your complaint about it) then almost all developed countries, and there is one more (small) country with global taxation.