One of the common accusations thrown at Marxism by others in the movement is that it is "economistic" - it reduces everything to the economy and class relations and therefore can't deal adequately with questions of oppression.
On the surface this can seem a reasonable point.
Oppression doesn't mirror class but cuts across it. All women suffer from sexism, whether an Indonesian factory worker or a highly paid (though not as highly paid as her male counterparts) London City trader. A factory worker's experience of her oppression, however, is very different to that of a rich woman.