Earlier quoted context omitted.
> it should be an easy political win for legislators to smack it down with some new more specific laws. Which is a lengthy process and relies on Congress actually being effective and free of corruption, which they aren't.
While agencies may be faster, are they, in general, more effective and less corrupt?
As for corruption, I suspect agencies may be more or less corrupt on an individual basis. I don't have any hard data, but I suspect they're less corrupt on average. The Supreme Court has, repeatedly, given Congress members the go-ahead to be almost as corrupt as they want, while they're harsher on executive branch agencies.