When my kids were younger, there was a known group of good sitters that we used with our friends. The going rate was historically 8/hr so with tip, it worked out to 10/hr. We didn’t use them much, but always got them when we needed them because we paid 12/hr and with tip, it worked out to 15/hr. It was worth it because we only had time when we had time.
Similarly, I bring in a regular Friday treat for the office staff, who serve my colleagues and me equally. They wonder why my requests get priority over theirs without me asking, and I tell them exactly why. Yet none of them have offered to share in the TGIF expense, and actively also partake. Again, it’s worth it to me because I get better usage of my time, which I can’t buy back at any rate.
If you don’t want to tip, then don’t, but demanding that “fair wages” be paid by law in societies where that is not the norm (most of them where vacation diving takes place) just isn’t realistic. If that were the case, then I doubt that the vacation area would remain affordable to most. There’s a reason why everything is so cheap.