Why would you oppose a better tax system if that system didn't necessarily help you? I thought all conservatives supported a government that allowed for individual success. If I'm mistaken, then clearly we need to redefine conservatism to allow the half of the country that doesn't pay taxes to call themselves conservatives.
Don't forget about the imbedded taxes in the price of goods that you already buy.
I'll grant that IF prices decline by at least the amount of the tax (I'm skeptical) then a person with accumulated after-income-tax savings wouldn't be any worse off. But he'd still be paying twice the taxes.
I personally support the idea of a sales tax of some sort. It would encourage saving and investing - both good for the country and individual families.