stocks values are deep linked to real economy, moving such amount of value can do big effects on real world, inflations, investments, development decisions..

In the hands of such small elite individuals is even worse, because financial activity at this levels call for deregulations more and more, and without clear rules the effects on all the ordinary people are big and real, the "pile of money" is the real money missing in the lives of all the rest of the world.

Big wealths are ok, but when some (millions) are (quite) missing the basic for living, i think some adjustments are needed.