Comment by NoToP

Recently I've been reading the report of the Knapp Commission, which was a 1972 inquiry into police corruption in New York City. That sounds tangential at first but it really isn't, the findings of the commission are broadly applicable. One of the major points of it being that corrupt officers correctly judged they had very little to fear from prosecution. There's this great table on page 250 showing the complete lack of prosecutions in the years leading up to the commission, driving home the point.

The reasons for that utter lack of prosecution leading to massive corruption is a microcosm of the broader circumstance to which you've pointed out.

Having read the Knapp Commission report, I am no longer of the view I have anything original to say on this.