One of the biggest lie sold in the West is that if you work hard, give everything you should succeed. This has grave implications on policy and really blinds people born with a silver spoon to the real problems in society as they have a 'i deserve it and they don't syndrome'. Contrast this with a poor society that is growing rapidly where you see islands of wealths with certain individuals, at least people over there…
Depends what you define as success. Hard work generally does lead to gainful employment and the ability to afford a home/car which used to be the canonical symbol of success in America. If you think success is "be as rich and respected as I desire to be" then that absolutely will not hold.
There simply isn't a link between "working hard" and any measure of success above the lowest baseline. Some people succeed because of a small one million dollar loan from their parents without having to ever work hard.