AMEM! Abolish the stupid and tyrannical 16th Amendment...
...and the 17th!
A flat rate across the boards is still a tax on income, which means you'll still have the hated 16th Amendment, and most probably, the IRS. I'd like to see a more fundamental shift in funding the government. One that shifts the burden from productive activities, to consumptive activities, i.e., the Fair Tax.