what you describe is mostly a wash.
there are a number of factors regarding the dispensation of public coffers, but from what i can gather, the largest, 5 to 7 megawatt wind turbines, the generator inside them is direct driven, no gear box, and is larger (measured in kilograms) than a 100MW hydro turbine. *
there are about a dozen other factors involved for wind turbines less than 20-50KW that dwarf the kilogram dollar per kilowatt peak power math regarding the generator.
*cost is about the same per kilogram, 1$/lb for steel, and 9$/lb for copper.