Where is your evidence to support your statement that singles some time spend more than couples? that singles some time spend less than couples must also apply with that logic.
I did not say that ALL singles spend more than couples. Most normal people would realise that i was speaking in general terms & from personal experience.
The cruise world is made for couples. Try the cruise lines that cater for singles (Fred. Olsen, SAGA, P&O) and although you will pay more the surcharge is not excessive.
The charge will be that which the market allows....that's business. .... Neil.