Because They've Earned It

That makes no sense... The poor would pay less in taxes than they do now.
Most poor pay most of their taxes in sales tax and would pay less due to having less income and the poor and middle class are those who support the flat tax the most when it is discussed.
It is the rich, who would end-up paying the most in increases because of the elimination of loopholes and shelters, who fight it and put the most spin against it during those discussions.
Because something is difficult does not mean one does not try. As a Libertarian, all I believe in is an uphill battle. This past election shows that many things one does not believe is possible are often just around the corner.
NOTHING is impossible as long as one never gives in to that pathetic word for losers.
A flat tax is a "Flat Tax"... there are no loopholes, 2% or 10%, that is IT, no matter WHAT, come Armageddon, cancer, three arms, the boogie man or a "religious institution".
Income is income or paying for something is paying for something, end of story.
Again, I don't care how you do it. (yes that includes your kids damn education, your housing and food, etc, etc, etc...)