The real problem is that ANY tax system will be corrupted.
The current income tax started real simple too.
Once some pol discovers he can win votes by changing the tax system to favor a special interest, the slippery slope begins.
That sort of thing is very much harder with the FairTax since any change in rate or application affects all taxpayers and cannot be hidden as at present.
Hardly! In a system such as the FairTax, changing the rate affects everyone and any attempt to do so would be strongly resisted. A similar reason applies to trying to introduce exceptions - everyone else must pick up the difference and there's no hiding place as with the present convoluted nonsense.
I'm afraid you're too ingrained to the income tax and its faults - everything's not like that at all.