I also used to not tip on takeout orders for the same reason until someone who used to work at a restaurant told me I should. The explanation made sense to me

I also used to not tip on takeout orders for the same reason until someone who used to work at a restaurant told me I should. The explanation made sense to me though: The same waiter that waits tables has to package your food for you. Obviously it doesn't take as much of their time as people who sit down to eat so you tip less, but you're still using their time that would otherwise have been spent on people sitting at the restaurant. Of course I wish we could just get rid of tipping by increasing the costs of the goods and paying them higher.