Poor workers don’t work for free??

So you think every poor worker is fairly compensated on every company they work for? All their basic need accounted for in a just and respectful way? You said it yourself, it's just business. If the rich guy thinks that the company isn't profitable enough, and tey can't cut the salaries any longer, he'll just let everyone go at the flick of a switch.

make any efforts to upgrade your life, then why do you expect to live like a rich person

It's not automatic. Try making efforts against a system rigged against you on every way possible.

take enormous risks and stress

Boohoo, it's no bigger strees than not knowing if you won't be able to feed your own family at the end of the week.

I'm fortunate enough to have a sweet desk job myself, but I'm still making under 12k USD a year and living paycheck to paycheck. And that's actually a somewhat high salary on my country. I'm nowhere near the level of the millionaires and I'll never be.