How do young adults spend more than they earn?

When I see young adults that have minimum wage jobs, how do they afford so many things? I see people like this that have their own apartment, a decent car, iPhone, iPads, always shopping for clothes, going on cruises, ect. Going on a cruise for a week when I know for a fact they don't even get vacation at their job. Whey don't they just tell everyone it's their parents that are paying for everything?

They have no sense about money.