Most people who don't want to work today do so because they don't want to get stuck doing jobs they don't like (and options to get a chance at working on jobs they might like are next to non-existent).
So... most of the time, this is actually their way of 'rebelling' in the present system.
Society would be just fine even if 'most' of the global population were so-called 'free-loaders'.
Look at today's society and most jobs. Most aren't contributing to society in a productive capacity at all - they are utterly useless to Humanity's needs and development at large.