[ZenGum]

Is this a natural trend?

I think yes. Wealth accumulates. If nothing is done about it, this will keep going, until it cannot go any further.

Do we have to sit back and let it happen?

No.
The modern economy is something we have created, a lot by individual and corporate activities, and also a lot by governments creating sets of rules that make a stable society and complex finance possible. We can adjust the rules. We should just remember that we are tinkering with a complex, chaotic system and unintended consequences are pretty much certain, as is the further exploitation of whatever changes we make.