I think its a bit myopic to lay all this at the feet of "unregulated capitalism".
This phenomenon goes back to the dawn of civilization regardless of the form or specific "ism".
Certainly, a good point is that power has always wanted more.
In this case, however, it's very hard to argue Bill Gates would be causing as much mischief as he is, if they didn't break up Microsoft for his bad business shenanigans back in early 2000s. But, 9/11 happened and all of that suddenly went away.
When the white-collar crime cops suddenly are unfunded, one has to raise the alarm.
In the end, too much power in the hands of too few people is ALWAYS a problem.