I'm skeptical that no level of taxation can support the government. Bill Clinton was able to balance the budget, and that wasn't so long ago.

The government collects trillions of dollars a year in taxes as it is. A significant percentage increase to the level of taxation against top earners would make a huge difference, and it is difficult to fathom what operation the government could run to remotely approach that level of increased revenue generation. What do you have in mind?