Taxes: Stephen Moore mentions something in passing here:

Polls over the past ten years have consistently found that the majority of Americans think that no family in America should have to pay more than 25 percent of its income in taxes. As the Wall Street Journal has pointed out in reviewing these polls, the 25 percent cap includes all taxes: sales taxes, property taxes, payroll taxes, income taxes, cigarette taxes, business taxes, car taxes, you name it. The government is not welcome to more than 1/4th, no matter whether we are talking about Bill Gates or the janitor who cleans Bill Gates's office at night.

What would you say to that? The Fed takes a flat 17%, the state takes a flat 8%, and nothing else need be said. No property tax, no "estate" tax, no sin tax. (One additional thing I would allow is a user fee for road usage, either as a toll or as a gasoline tax, but only with the provision that it could never co-mingle with general revenue. General revenue funding of roads is a sop to the trucking industry, just as railroads were to rail tycoons in the 19th century.) Plus, a constitutional provision that taxes could never be raised. Congress would have an incentive, all of a sudden, to get its fat ass out of the way and really let the economy hum, since rising budgets would be tied to a growing economy.

I think there's something to this.