For those of you who believe that you can spend yourself out of debt and enjoy the same level of taxation, a little dose of economic cold water is in order, appropriately on the day after tax day.""" Many economists, including some who voted for Obama, do not believe that he can indefinitely avoid imposing tax increases much further down the income scale -- on the middle class. "You just simply can't tax the rich enough to make this all up," said Martin A. Sullivan, a former economic aide in the Reagan administration who said he backed Obama last fall. "Especially just for getting the budget to a sustainable level, there needs to be a broad-based tax increase," said Sullivan, now a contributing editor at Tax Analysts publications. "If you want to do healthcare on top of that, almost certainly, it just makes [a middle-class tax increase] all the more certain.""""And toss a little "cap-and-trade" on top of that, and whoa Nellie, the sky is the limit when it comes to the taxation necessary to support all of that.[...]