Income tax rates are already set to explode next year, as well as taxes on capital gains and dividends. My family's taxes are due to go up by over $4,000, and no, Congress will not do a damned thing about it. Eliminating mortgage deductibility would cost us another $1,500+. At that point, I'll consider another country with lower tax rates, of which there will soon be many.
It's a big fat failure. Abolish it and move on.
“...make everyone who works pay it (as opposed to only half of the those who work), and then we can talk.”
Almost got it. “...make everyone who receives income such as via government checks, pay it.” This now includes the welfare hos, etc. EVERYONE MUST PAY the flat tax.