system
Given the following post, respond as if you're commenting on Reddit:
human
How much money is ending up in unproductive wealth hoards?

The engine of a market economy is that my spending creates your job. But I’ve heard a theory that a lot of money is ending up in hoards, just sitting there, never being spent or invested. As an example, tech corporations have a lot of money just sitting in their coffers, used neither for investment nor returned to shareholders as a dividend. The more money ends up in these pools, the less spending creates jobs, and the weaker the labor market gets.

Two questions. First, what data is there on the existence of such unproductive pools of wealth? Second, is this a reasonable theory of how such pools (presuming they exist) affect the job market?

Edit: thanks everybody for a lot of great answers!
gpt
The wealth is not in a Scrooge mcduck style vault. It is held in banks and bonds. That money is invested in the economy. According to the coase theorem it doesn’t matter to the economy if original company invests the money or someone else. All it costs the economy is the bank fees.