It's pretty clear that a lot of jobs today are useless and if you've worked for enough big companies, you might have realized that big companies are extremely inefficient.
If big companies are so inefficent, why then are they able to generate so much profit from the economy?
The reason is monetary policy. The Fed constantly 'prints' new money out of thin air and injects it into the economy via a combination of 1. loans to the government and 2. open market operations.
Guess who gets the first dips into these two huge pots of newly created money?
In the case of government money (loaned by the Fed), big corporations get a huge chunk of that money pot because they get all the lucrative government contracts.
In the case of open market operations; big finance firms like Goldman Sachs and big traders with insider information are the first to get their hands into that pot.
Basically that money which is meant to 'trickle down' isn't actually doing that; instead it appears to be trickling back up to government officials who are enacting policies that benefit corporations and increased centralization of wealth.