in general, "to be better off doing something" = to benefit from doing something , to be in a more fortunate, preferable, prosperous condition because of doing something
or "to be better off without someone / something" is also used, for instance:
I`m better off without you = I will be happier alone / without a relationship with you.
I`m better off living on my own = My life will be better if I live alone.
I`m better off than you = I have more money than you.
So to answer your question, "They benefit from having no expectations of owning satellite TV, fridges or carpets."