[Kamq]

> I hear outright wrong arguments for why the USA has not moved to a modern filing system.

The argument I always hear from the right about this is that they worry that making taxes more efficient will allow them (and government action in general) to increase. The right is explicitly committed to reducing that, so it's not in their interest.

Same reason I've heard from people on the right about ending withholding. They think that if people had to cut an actual check to the government every year (or quarter) that people would realize how much it's costing them and be more amenable to reducing it.