There again, Ian, one could argue against the notion of 'selflessness'. One does what one does because one feels compelled to do it and it gives one a feeling of satisfaction to do it. I doubt that Mother Teresa spent her years in India because she hated doing the work she did (ditto Albert Schweitzer and other 'saintly' people). Therefore, one does not work entirely without some sense of self entering what one does or achieves - be it mere satisfaction at improving life for others.
Likewise, someone who lives to accumulate vast wealth does not do so without benefitting others: they will no doubt provide income for others, whether directly through employment of people like domestic servants, chauffeurs, pilots of private jets, etc., or indirectly by purchasing a variety of goods, including original art, thus benefitting the originators, or manufacturers (and their employees).
Thus turns the world, with far fewer absolutes than we are often encouraged to accept.