This reminds me of our Christmas ski holiday in the US this December when we had a run in with the US tipping culture. We had breakfast included in the rate, I was presented with a bill of USD 180 plus taxes (USD 45X4 which I was told was only for accounting purposes and would be zeroed out). It was a buffet breakfast, the only service we got from the lady serving us was that she poured us some coffee and juice. I added 20 dollars to the bill which I thought was a generous tip for close to zero effort from her and something that will be taken off as it is included in the rate.
I was told off by the lady serving us who came back to us with the check- according to her the norm in the US is minimum 25% in tip and she would appreciate if we can tip her appropriately.
When I pay a property north of 1000 dollars a night, I expect them to pay the staff a decent wage rather than expect them to live on tips.