ELI5: How did tip culture start in the US? Why did restaurants start paying so low?
https://www.reddit.com/r/explainlikeimfive/comments/16q6he8/eli5_how_did_tip_culture_start_in_the_us_why_did/How Americans Tip at Restaurants Has a Troubling History | Time
https://time.com/5404475/history-tipping-american-restaurants-civil-war/