Last I checked, and it's been a few years, the entire wind power industry exists only because of tax credits - their financial structure is designed pretty much entirely around them. Take them away, and there are no new wind farms, which is interesting, because part of the reason that costs are high for wind farms is the scarcity of turbines. The turbines are scarce because the GE's of the world do not want to invest long term capital in an industry propped up by government subsidies... and round and round it goes.