> Is there any way to avoid this kind of market failure?

There are potentially undesirable tradeoffs and a whole new game of cheats and corruption, but you could frustrate rapid, concentrated growth with things like an increasing tax on raised funds.

Right now, we basically let people and companies concentrate as much capital as they want, as rapidly as they want, with almost no friction, presumably because it helped us economically outcompete the adversary during the Cold War. Broadly, we're now afraid of having any kind of brake or dampener on investments and we are more afraid of inefficiency and corruption if the government were to intervene than we are of speculation or exploitation if it doesn't.

In democratically regulated capitalism, there are levers to pull that could slow down this kind of freight train before it were to get out of control, but the arguments against pulling them remain more thoroughly developed and more closely held than those in favor of them.

> there are levers to pull that could slow down this kind of freight train before it were to get out of control

Care to share some keywords here?