Regardless of whether Gates was 'lucky' or not.
The fact that he has kept (and grown) whatever gains from 'luck' is evidence of his skill
You could give most people (95%) the same wealth, and they'd squander it in no time.
Doesn't matter what taxes the governments sting the rich with, it'll still end up back with the same types of rich people again.
Why ?
Because they do what 95% of people aren't willing to do.
If it hadn't have been software, it'd be oil, or land, or publishing, or media, or even stocks, or similar.
Gates( and people like him) will always come out on top.
In my opinion,
Porks.