He’s actually full of shit. It wasn’t to pay black waiters less, it was to pay all waiters less when restaurant business plummeted during the prohibition.
Are you sure about that?
https://time.com/5404475/history-tipping-american-restaurants-civil-war/
After the Constitution was amended in the wake of the Civil War, slavery was ended as an institution but those who were freed from bondage were still limited in their choices. Many who did not end up sharecropping worked in menial positions, such as servants, waiters, barbers and railroad porters. These were pretty much the only occupations available to them. For restaurant workers and railroad porters, there was a catch: many employers would not actually pay these workers, under the condition that guests would offer a small tip instead.
“These industries demanded the right to basically continue slavery with a $0 wage and tip,” Jayaraman says.
