Originally Posted by Eastbay1K
And double is the answer. I have no doubt I wouldn't have earned about 200K in MP Visa credit for tax payments last year if my state taxes weren't doubled

Stop with the tax avoidance schemes and you could have that many more frequent flyer miles.
If you can't find a way to raise your tax liability so as to collect more frequent flyer miles through these credit card deals, the federal government does have a fund to which people can, for whatever their reasons, simply contribute money that goes into the general treasury. You might explore that rather obscure possibility. For me, the ability to earn double miles by paying with a credit card is just an anodyne to ease (not eliminate) the pain of paying taxes.