This is a forum for engineers, scientists and technicians. Let's try to act like what we are and use data in a presentable format or else admit that we don't have them.
Yes please.
The petroleum industry does receive some specific "subsidies" (at least here in the US) that I am aware of in the form of tax shelters and so on. They are arcane, specific rules related to production and production equipment. They vary from state to state.
I suspect you're right that there are state specific tax breaks as well. The TCS reference I provided earlier outlines the federal tax subsidies. The IMF report addresses worldwide subsides.
R&D credits may well provide differential benefits to the petroleum industry since exploration and development of better extraction methods is such a large part of their costs, but that credit is available to all industries, including solar and wind. If wind companies are not taking tax advantage of their costs for site location and evaluation, design improvement and so on, then shame on them.
Targeted tax subsidies are widespread across many industries. IMO they make sense when an industry is trying to establish a foothold against entrenched competitors (yes, of course many will disagree). This has been going on for many years, across many industrial and technological areas.
Arguing that somehow RE is unique in this regard has no basis in fact.
The question becomes - when do you end the subsidies? What seems to happen too often is that the companies and industry subsidized early in their development that become financially successful then gain substantial political clout through lobbying and general corruption of the political process that always occurs. As time goes on the subsidies are never ended and often are expanded (case in point - the oil and gas industries)
If I were to point fingers at politics relative to wind turbines I would look at the NIMBY phenomenon. There aren't that many truly superior wind generation sites, and many of them have been blocked by folks who don't want their view ruined. Cape Cod being the most prominant national example.
Good point. NIMBYism is a major problem for energy/electricity production across the board. I grew up next door to an oil refinery that was built in the 1960s - before NIMBYism became commonplace. Wind farms ruining peoples views are prime examples as are the ongoing problems with nuclear waste disposal.
Getting back to the original post, wind power has significant maintenance costs due to it's mechanical nature - as do oil and gas drilling and refining, fossil fuel powered electricity generation and nuclear. Solar does as well but is better in that regard as there are few if any moving parts.
My view - as I've stated before - is that RE will never fully replace fossil fuels. What I find perplexing is why so many politicos are so devoted to impeding progress of something that can at least partially replace what is unquestionably a finite resource.