The drinks bars are fully stoked whether there is one or fourteen passengers in First. It is a standard loading. It is only the catering which is catered for the number of passengers.

In quite a few destinations nowadays, they no longer have the bars re-stocked downroute, so the stock for the outbound sector may be limited because of this but it does sound like a low amount of champagne for you, lucky it was not a completely full cabin!!!

I don't understand why they would make you feel guilty for using the CW champagne though.