[bumby]

Maybe you can help me understand by adding some details and nuance.

The percentage depletion part of the tax code is specific to oil and gas, so it's not quite the same as saying it's what "ever [sic] business in the country does." I agree it's not a subsidy, but it seems like a very specific carve-out for a very specific industry and a specific commodity. It feels to the layperson that it's an odd fact that the percentage depletion can exceed the cost of the well, which makes non-viable wells suddenly viable again. That seems like favoring a specific industry in legislation. A dairy farmer cannot, for example, depreciate "future reserves" of cows milk to make a non-viable farm suddenly profitable, can they? (Understanding that there are true subsidies for farming, that may not be a good analogy).