People have very different paychecks, very different family sizes and essential needs (such as necessary medication etc.). And yet, majority of people have to s

People have very different paychecks, very different family sizes and essential needs (such as necessary medication etc.). And yet, majority of people have to spend exactly their entire paycheck? I don't buy that. Sounds more like, for a lot of people, the lifestyle is inflated to as much as the paycheck allows.