I always tip my hair cutting person 100%. I wanted a hair cut, the hair cut cost $x, that person literally does the entire thing often with their own equipment that they paid for. The place will charge me $x because that’s what the haircut is worth to me but I know the person that actually physically cut my hair with their skills and labor won’t get $x and I think that’s bullshit.
In many other kinds of transactions someone can go “oh well the business deserves a cut of the profits because they provided the ingredients, or they stocked the inventory, or yadda yadda yadda”. But the hair cut is the one place where with my own eyes I witness the full body of labor occur and see who does it. That person deserves the value that their labor produced, not some owner sitting off in their beach house doing plenty I’m sure but one thing I’m damn sure they aren’t doing is cutting my fucking hair.