The fundamental Republican myth is that the country's fiscal problems can be tackled without new revenue  or, in the more sophisticated version of this argument, that they can be addressed by rejiggering the tax code in a way that would promote economic growth, and therefore produce additional revenue, without asking any households to pay a larger share of their income in taxes. In the Romney-Ryan version of the myth, marginal rates can be cut even further, eliminating popular deductions  deliberately unspecified  and counting on unduly optimistic projections to fill the gap. As the Tax Policy Center has demonstrated, that approach would "provide large tax cuts to high-income households, and increase the tax burdens on middle- and/or lower-income taxpayers."