Is tipping culture out of control? A former server explains why she won't tip at Starbucks.

Tipping culture is rapidly changing in America, so understandably a lot of people aren’t sure what to do when they buy a coffee and the debit card reader asks for a tip. It used to be that people only tipped bartenders, drivers, servers and hairdressers.

https://www.upworthy.com/who-do-i-tip