Your answer says something about why tips-included doesn't work. For generous people like your family, you feel happy giving good workers a big tip. It's not j

Your answer says something about why tips-included doesn't work. For generous people like your family, you feel happy giving good workers a big tip. It's not just part of the moving cost, but a small good deed. Participating in this is something extra you get for your money. You wouldn't get the same feeling from an included tip, which you can't be sure goes straight to the worker. Presumably if the movers were lazy or rude you would also be glad that you could choose to tip less. For cheapskates who stiff on the tip regardless of the quality of the service, tips-included just means a higher cost for them.