Regarding "the most subsidized industry worldwide", this wikipedia article does not mention any tax revenue and taxation of these companies. Which are stil very often government cash cows and often pays much more taxes than other corporations. The subsidies are straight to citizen's gas tanks and heating bills.
"Subsidies are mainly on consumption,[3] such as a lower sales tax on natural gas for residential heating; or subsidies on production, such as tax breaks on exploration for oil."
In my country Norway for example, we have tax breaks on exploration to incentivize investment in exploration, but you have to take into account that these companies have an 80 corporate tax rate! In many petro states they are straight up nationalized companies.