https://en.wikipedia.org/wiki/Regulatory_capture
https://en.wikipedia.org/wiki/Public_choice
Of course, my post above is sharpened and overgeneralized to fit in an online forum. There are more nuances.
A current example in the news is Facebook asking congress to be regulated. This makes little sense from a conventional perspective. From the Regulatory Capture perspective it's an obvious play. Government regulation will be very costly to comply with, and only FB and a few other giants will be able to afford it, thus cementing FBs monopoly position for the foreseeable future.
https://www.insidesources.com/facebooks-mark-zuckerberg-asks...
To be fair, Public Choice theory is certainly on the more controversial half of the subfields.
And of course you shouldn't blindly take some random post on this forum as complete proof of how the world works. That would be a foolish gullibility. Then again, completely rejecting it isn't the wisest thing either. At least that's my view :)
When has economics ever been a science?
But that's a small part of Economics, and the field in general is as hard as any science outside of physics, and had given us an enormous amount of insights we lacked 200 years ago, and contributed immensely to the relative peace and prosperity the world enjoys today.
just because a regulatory agency did its job by protecting the pulic’s interest doesn’t mean it will always work that way. so your example doesn’t negate the existence of regulatory capture, which is an actual thing and not some political propaganda.
So without regulations, there are fewer people to corrupt.