[powatom]

"It worked out great for me, so it must be ok".

In my country, we still have tips - but it's not some kind of obligation. You tip if you want to, but if you choose not to, then nobody is going to chase you out of the restaurant and demand extra money. And yet, somehow, service is basically always fine.

Of course, if given half a chance, I'm pretty sure restaurants would just love to adopt the American system - but then greed never knew any bounds.