It is hard to pick out what is the highest if you look at more than just tax credits. Mineral extraction gets very favorable federal land lease prices, eminent domain seizure of private property for pipelines, etc, nuclear gets insured from the feds since no private insurance will take the risk, shipping petroleum on the ocean gets the protection of the US navy, ports and waterways are maintained and dredged by the army corp of engineers sometimes. There are a lot of handouts to a lot of industries that aren’t easy to calculate since it isn’t a direct tax credit.It's already the highest by far and I'm not saving thousands.
I also don’t see further incentives lowering costs to consumers, I feel large corporations or utilities will just keep the extra cash and not “trickle it down”