Leon Trotsky lived briefly in New York, USA, before the Russian Revolution.
Tips undermine the dignity of workers, and people refuse to tip even at their favorite restaurants on the grounds that humans should earn a decent wage and not depend on tips.
It is said that the waiter went beyond simply not giving tips and openly encouraged guests around him not to tip, and there was even an incident where a waiter got angry and poured over his soup.
Tipping culture was hated even by hard-core Bolsheviks.