The truth is there are people who either luck into situations that provide them a satisfying life (i.e., they inherit income from family, are born into money, win the lotto, or get discovered in sports and entertainment), develop a bright idea into riches, or work harder than others either through laboring or get a high quality education and use same to further their professional career. Very few people have the wherewithall to know exactly what they want to do in life while they're young and are continuously encouraged to pursue their ambitions.
Furthermore, not everyone has the opportunity to attain wealth. Most people will just have average lives. Most people are afforded an education via the public education system, but that's about as far as many people can afford to go. Even with loans and grants, most high school graduates can't afford to attend college. Most young adults start off in the labor force working a minimum wage job (unless, of course, they luck out and know someone who sees something in them to take a chance and give them an opportunity to better themselves), and if they're lucky or work hard enough they can progress up that economic ladder.
And then there are those who just can't catch a break with a net! Circumstances befall them and they can never get out of that revolving door of dispair and poverty. Sometimes, they bring things upon themselves; other times things happen beyond their control (i.e., a devastating accident or lost of the primary bread-winner).
To think that everyone will be exposed to the same or similar opportunities to attain wealth is just foolish. Most people want to do for themselves as opposed to just having things handed to them. Moreover, I seriously doubt people want to be poor. Unfortunately, they either don't know what to do to change the circumstances of their lives in a meaningful way or the opportunities just never come their way.