>>I’d rather see 10-15% staggered by income (three tiers: low, middle and high)<<
In 5 years you would be back where we are now.
Flat tax or sales tax (not both) and nothing else.
Changing the tax code would be paramount to a constitutional change so make any rates locked in and only changeable by state ratification or more than simple majority in both chambers.
There would also have to be same type of laws for spending and balance budgets mandatory. The states have got to have more say so when these entitlement spending bills come down the pike.
Repealing the 17th would help by putting senators again answerable to the states.