Most human economic activities are influenced by the need for money.
Yes, money is a drive for most of us.
But why can anyone not become rich?
By that question I'm assuming that you, yourself, aren't rich. I want to say that it's because the current economy was made so that people will continuously work for the rest of their lives but never really become rich. The only way that you become rich is to have a stable job, and then eat as cheap but healthy as possible. Make your lifestyle as cheap as you can. All these just to have enough savings to do business. Of course money isn't the only thing that you need in order to run a business. You need to learn how to run a small business and make your way up to making it a bigger one.
What are the reasons why others work hard yet they are still poor?
It's because of their lifestyle choice. People work hard and smart and thus they end up having a raise. With this raise, they feel the need to step up their lifestyle when they don't really have to. Just look at the regular employees that are sipping Starbucks coffee as if they can afford it. They can't. It's been long before I realized that these cubicle workers don't really have money saved up. They go abroad, they travel locally, and all these grandeur life that they are having but their salary isn't really that high. They are going to be bankrupt right when emergency money is needed because they aren't saving up. They are earning money but they are spending it right away. They might have saved some, but it's not enough. At least not enough to start a business and get themselves out of poverty.
Why can't we print enough money for everyone?
Because that means everyone will be having money and thus money will have a lower value. We're just going to inflate our currency even more by printing money for everyone. Assuming that everyone has suddenly $1M on their bank account, the things that you can buy with $1M will suddenly become different. If back then you can buy a house and lot for $100K, now it will take a lot more than that since everyone has that kind of money and everyone's willing to pay that amount of money in exchange of a house and lot.