No good deed goes unpunished.
You like your server/driver/busboy/maid/etc. you tip them. All of a sudden they're raking in the dough. The other staff/management gets jealous and in an attempt to make things 'fair', they pay the staff less and start cutting into their tips. Even the government is onboard by having a separate minimum wage for servers/bartenders. Now we're expected to keep 'tipping' everybody or else we're the bad guys.
We're enablers.