I'm confused as to what your issue is.I want the service you are required to do. Idc about a rental car worker upgrading me (if I really want an upgrade I will pay for it)
With all these examples you WANTED extra (some of these things that put their jobs on the line) so you willing paid extra....
While even if I get no extra or even poor service I still must pay at least 20% or I'm wrong.... All because YOU CHOSE to have a job where you don't have the incentives in promotion as firefighters and cops....
So should I tip my lawyer who I paid 5k to 20% so he can try to win my case harder?
Why must you tip 20%?
Good lawyers are typically associated with costing more money, so you would reward a lawyer if you want your case won.