Facilitation payment are usually considered the less egregious kinds of bribery, some may be considered acceptable in a culture, and there can be a whole etiquette to it.

In some countries, doctors or surgeons are severely underpaid and it would be customary for a well off citizen to bring them a gift or a cash summ before an important surgery.

That’s quite different from Kickbacks (rampant in UK leaseholds by the way), etc.