It's a side-effect (uh, or, deliberate feature) of modern POS systems. Defaulting to having a tip line on receipts for e.g. a carry-out meal from a restaurant,

It's a side-effect (uh, or, deliberate feature) of modern POS systems. Defaulting to having a tip line on receipts for e.g. a carry-out meal from a restaurant, which people never used to tip for, or showing a tip option on an iPad in a situation that never, ever called for tipping before and the worker is standing right there watching you fill tap or fill out the receipt so you feel like maybe you're being a dick (what's the norm now? Are you one of those assholes abusing sub-minimum-wage tip workers if you don't tip? Who knows!) if you don't. Tipping was just not even considered in these transactions, before. [EDIT] Oh, and percentage-tip defaults for situations where the norm before was maybe you toss your extra change or a $1 bill in the tip jar, and it was pretty normal not to tip at all most of the time. "18%, 20%, 25%, Custom, Skip".