Let's start with a claim that subsidies should be removed (in the United States) because the generation is a mature, viable option:
AEA Study: Removing Big Wind’s ‘Training Wheels’ | American Energy Alliance
WASHINGTON D.C. – A new report released today by the American Energy Alliance (AEA) concludes that wind energy is a mature industry whose growth has rendered the federal wind Production Tax Credit (PTC) an obsolete government hand-out that should be allowed to expire.But on the same day as the release of the study that the "Training Wheels" can come off, The American Wind Industry Association was announcing that over the first 9 months of 2013, after the near death experience of a tax credit at the end of 2012, little capacity has been added
The AEA-commissioned study, “Removing Big Wind’s Training Wheels: The Case for Ending the Federal Production Tax Credit,” documents the explosive growth of wind generation as well as the favorable outlook for future wind generation development as a result of Renewable Portfolio Standards (RPS) – not the PTC.