To be fair, all the extremely wealthy people I know have just been in the right place at the right time. That's not to say a lot of blood and sweat went into getting where it is now, it's just that there was some luck at the beginning!
I have a huge amount of wealthy friends purely through my social circle and business, not through choice just happened I share a passion that attracts lots of wealthy sorts (not coke). Some of them have grown up with silver spoon, some have inherited money though little effort, most have worked their nuts off, are incredibly skilled people (hard working, education, insightful, inventive, entrepreneurial) and have done what they did through hard work and applying those skills. I am not close to their success but frankly in my 47 years peoples success is rarely down to luck and luck has helped them occasionally but is not the route cause of success to the fact where without there various bits of luck they would still be achieving great personal wealth.