In Georgia, we pay 6% income tax and about 7% sales tax, at the same time!
If you haven't noticed, we happen to be talking about taxation at the federal level. Not states. But don't let facts get in the way of your Strawmen.
There has never been a general sales tax at the federal level, even before the income tax, so your "past performance" assertion was self-serving tripe.
Not really, we were talking about what the electorate will let the politicians get away with. And clearly they let politicians get away with both.
In the case of the FairTax I expect the income tax would be reintroduced as an emergency tax once the bulk of the economy went underground or disappeared into the "used" market, and the income tax would only be on Rich people who earned more than say $75,000 per year, say 20% tax, they won't miss it, they're rich anyway.
No strawmen over here.