Schedule C to Form 1040 (self-employment income) asks for your "Principal business or profession, including product or service". It's pretty clear that the only correct answer for some people would be something like "drug dealer".
Musicians want to accept credit card payments (you lose a lot of potential sales if you only take crypto), which requires a central party to handle payment processing.
The US doesn't have a centrally planned economy, so the government can't lower the prices of everything. UBI is much more feasible to implement than communism.
Overflowing addition is never UB in Rust - it is defined to wrap around in release builds (i.e. it would be a compiler bug if adding 1 to 255_u8 in a release build produced any value other than 0_u8).
I don't think amounts that are on a payment plan would qualify as "bad debt" though - if someone is paying as agreed on a payment plan the debt isn't uncollectible.