You are absolutely right. Whatever the company pays me is between me and my company and what the housekeeping should get paid is between the housekeeping and their employer, the hotel.

Any tip that you give comes out of your meals and incidentals allowance. I still don't understand how they got away with it since they are a federal contractor. I put down the per diem rate for London, but my supervisor refused to sign my expense report and would not deny it in writing. When I did not make any headway, for a year, I gave it as further delay would have made it difficult for me to get any reimbursement. The amount involved a few thousand dollars that I could ill afford to lose.

Federal Govt has very strict standards for allowable expenses. My wife, working for a bank, stayed in better hotels than I did.

Maybe those who tip can provide a guidance about what is considered a reasonable tip by them since those of who don;t would have no idea.