First of all, understanding material self-interest is no simple matter. Even here, I mean among a bunch of avowed leftists, we had a debate on whether racism is in the interest of white workers. To understand that racism is against the interest of not just workers of color but also white workers as well, one must have a conviction (backed up by theory) that (A) white workers, too, are part of the working class & thus have surplus value extracted from their labor power by capital; and that (B) the working class have a collective self-interest. Neither A nor B is self-evident on the basis of appearances (as opposed to a theoretical understanding) of capitalism. So, it is no wonder if a bartender in Toronto, who is not employed by Bill Gates & thus is not directly subordinated to him, thinks that she has nothing against him. As far as she is concerned, men like Bill Gates might give her bigger tips than Carrol Cox or Doug Henwood!
Yoshie