I lived in Switzerland for 6 months and being originally from the US I tipped a server at a restaurant reflexively by leaving money on the table. The server picked it up and brought it back to me before I left and said “This is not necessary, I get paid to work here.” Being the typical clueless American I was stunned. But I learned over time that just as I would not tip my accountant, banker or lawyer - or plumber, carpenter or mechanic that in this case here was another person I received a service from who did not need “charity”.