Make the right thing easy and inexpensive and the 'wrong' thing difficult and expensive.
As opposed to today's methods to the contrary.
Flat tax without deductions is where we want to end up, but will only work if the ability to raise taxes is made more difficult - say; supermajority of both FULL houses of Congress.
Similar restrictions on new spending will also help.
With such restrictions, we will be much more certain that any increases are, indeed, the will of The People.