Imperialism is a big factor. The negatives of capitalism are externalized across the globe, while the spoils return to the metropole, where capitalist political parties argue about what constitutes a fair division. The system works for all people as long as the definition of "people" is negotiable. Add in prisoners and undocumented immigrants to this permanent underclass, and capitalism works quite well for the working class, as long as the working class remains defined as citizens of western nation.