In some countries you do.

When my grandpa was in the hospital towards the end of his life, the nurses let him lay in his own piss for half a day before doing anything about it. We gave them an envelope with a generous "tip", and after that they started paying much closer attention to my grandpa.

Many people give a few thousand USD cash to the midwife and the doctor after delivering their baby.

The line between bribing and tipping isn't that thin.

which country is this? you tip all service staff? are you presenting me a logically coherent tipping culture or just another version of the american righteousness?