Solution: Where does my parent's money come from?

Here you see two of six feedback loops. A reinforcing (red) and a balancing (blue) loop.
The model, of course, can become way more sophisticated. This is the typical result of 90 minutes including the analyses.

Here is an example of the central target's Insight Matrix. You see that buying things seem to decrease your money short term ...

... yet long term in develops possibly an increasing effect. The message here: other need to have money that they can buy something so that we can earn something.