How self-interested someone is highly depends on the individual and their culture. Glorifying egoism, as common in capitalism, makes things worse than they have to be.
For this reason, we must glorify not-egoism and those selfless luminaries of Communism such as Stalin and Mao who would otherwise be forgotten. Indeed, the cult of personality where the middle class seeks anonymous salaryman status is the true danger.
Actually, we must glorify Stalin and Mao because literally the only other alternative is an Ancap dystopia in which homosexuality is <s>illegal</s> against the proprietors' covenant and children are traded on the free market.