The tax issue seems like a trick. If I were running for president, I'd say very clearly that I think the problem with government today is not too much force, or too little, but the improper application thereof. Either they apply too much force where it's not needed, or too little where it desperately is. Ergo, I would abolish most taxes, but use almost the entire amount of the revenue collected to help the poor and the sick, and then use what's left over for reasonable defense. Everything else should be left up to the states. The federal government ought not be the endless moneybag of a continent-sized federation; that is nothing else but institutional bribery on a massive scale, hence our pitiful condition today.
Your world would collapse in a few years, though. Not that it would be that bad.
http://i.imgur.com/TQWh1.jpg