> Whenever people are unsupervised and there is a chance for fraud or bad behavior and, due to the lack of supervision, they believe they won't be caught, you should ALWAYS assume that people will behave badly.

Do you have any evidence to support your claim?

On the contrary, a 2019 analysis [1] combined 400+ experimental treatments, 44,000+ participants, and 47 countries. Participants surrendered roughly three-quarters of the money they could have obtained through maximal lying. In repeated experiments, fewer than one participant in twenty consistently claimed the payoff-maximizing outcome. Increasing the potential reward from a few cents to approximately $50 did not cause people to approach maximal dishonesty.

In a field experiment [2] with 17,000+ apparently lost wallets in 355 cities across 40 countries, people were generally more likely to report wallets containing money than wallets containing no money. The effect appeared in 38 of the 40 countries. The researchers’ follow-up evidence pointed to concern for the owner and an increased aversion to thinking of oneself as a thief when more money was involved.

[1] https://onlinelibrary.wiley.com/doi/abs/10.3982/ECTA14673

[2] https://www.science.org/doi/10.1126/science.aax5034

I don't think these studies meaningfully replicate the motivation of real life situations where there is either a lot of money on the line or emotional investment. Anyone can be honest when it's $20 on the line

This is so typical. It is known for millennia that people tend to steal and enrich themselves whenever an opportunity arises. Common sense so to say.

And you show up with a study.

Sorry but I had to point this out.

It's not all people, but always people.