Those in the "higher tax bracket" will almost invariably promote the "flat tax" as the only "fair" tax, they then ramble off a couple of ridiculous statistics they claim demonstrate they pay "more then their fair share"

The fact of the matter is completely opposite;

Even with a true progressive tax, and even if we did not consider how easy it is for the wealthy to find tax haven and deductions, they still pay a far LOWER percentage of their wage to "over all" tax then the middle and lower class as we can see as we find demostrated here

Who Pays Taxes?

The short answer is this: you and I pay the taxes that rich and powerful people ought to pay, but don’t.

In the year 2000, at the height of the last economic boom and before the most recent round of tax cuts were enacted, IRS data shows that the richest 400 taxpayers paid 27% of their income in federal, state, and local taxes. On average, these 400 taxpayers each had taxable income of $151 million. All other taxpayers had average taxable income of only $34,600, and yet their tax burden was 40%.

Using that reality, a "true" flat tax would result in a far higher progressive matrix then anything we have or have even considered

I believe the only way we can really facilitate a "true" flat and continue the services necessary for proper governance would look something like this;

Remove personal payments for all government services, for instance sales tax, park fees, tolls, road tax that’s added to gasoline, etc.

However the government would still "bill" for that revenue, the bill from local government will of course go to the federal government, the federal government will then "collect" those fees through a universal and flat income tax

Bing, a "true" flat tax

Now, you get a progressive talking like this and I guarantee the wealthy will stop immediately asking for a flat tax.