Is it the vast majority of their income like wait staff in the US?
No? Then tipping is optional there and has nothing to do with what Trotsky did which was in the US when 100% of their income came from tips or current US waitstaff where the vast majority of their income still comes from tips.
Is it the vast majority of their income like wait staff in the US?
No? Then tipping is optional there and has nothing to do with what Trotsky did which was in the US when 100% of their income came from tips or current US waitstaff where the vast majority of their income still comes from tips.