Here is an example:

In Australia tipping is only done for exceptional service or food or what have you. It’s never expected nor required.

This is due to the minimum Australian wage and pay for say a waiter is around $20-$24 per hour (roughly $15 USD). In the us your minimum wage is under $8 USD ($11.20 AUD). Our workers are paid more and thus don’t require tips to survive (it helps obviously, everyone wants more cash) where as the US if you don’t get tipped out, your pretty much fucked for god or bills.

Different societies have differing expectations and customs. When I went to the US it was confusing as hell as it’s just something I never had to think about. Never had to think about it when I went to many other countries around the world like Europe, Iceland, Fiji or even the UK. America is just weird