Davos queues up anti-economic drivel.
But what is the accusation here?
So they're rich.  What did these two do wrong?  What are they doing for our country, for your grocery getting habits, and our tax base every day of the year?
The 8 list who have half the world's wealth (excluding of course Putin esque names), are all first generation wealthy.  They went and made something we all buy or value.  
They didn't conquer you or your people, at gunpoint, and force you into tax slavery.
Your kids will read a different 8 list in 40 years.
This is life.