Because we are growing up in a culture that encourages, if not fosters, entitlement and lassitude. A lot of young people feel entitled to the NHS, benefits, free education, etc., because the value of hard work and industriousness isn't being preached enough in the home and at most schools. Our peers are enchanted with the idea of high taxes for the rich to subsidise the lives of the poor (ironically, most legitimately poor people, such as the homeless and heavily disabled, don't actually benefit from this; the main beneficiaries in such a system are people who find excuses for laziness and mediocrity) and collective bargaining for more lax working conditions because those two policies, for example, would enable them to live the comfortable lives they desire without putting in the hard graft that's required. I suspect a large number of young people want a "fairer" society where others pay for their stupidity and indolence because they, themselves, want the fruits but cannot be bothered to labour—and that's the sort of mentality Marx promulgates in much of his work.