Not everyone who was born poor has the resources to get rich. Some our born with good looks, some gets lucky and some just doesn't really have anything. It is really easier to say that they should just get up work to get rich because we are not in their shoes but if you dig deeper into reality, they are just trying to survive. Getting rich requires taking risks and risks are expensive.
The poor remains poor because they want to get rich or try to live the life of the rich. Thus spending more than what they need.
Money management is the key factor for one getting rich or stuck being poor. Planing and acting on it could potentially boost the rate for one becoming successful in life.
If you look at the world's richest person, they were poor too. But they had the ambition to overcome their lifestyle and broke the system to reach at this point. And no, no one wishes to stay poor. It's just the situation and their personal choices that holds them back.
Money management is impossible when there is nothing to manage. Some just manage to get through the day, and spend their money only for food and bills. There's nothing even left for savings or insurance. Living a happy life becomes the best option for most people, and happiness is relative.