One reason that "they" don't prosecute drug dealers armed with machine guns is that "they" want that felon to be on the loose in society, wreaking havoc. "They" use these felons as a boogeyman, to justify the sweeping Societal Changes that "they" want, such as "Gun CONTROL".
"They" create or magnify a problem, then offer up what "they" want as the "solution". It's a twisted form of social engineering.
I hope it's obvious who "they" are. I'm trying to keep this out of G.D. or a lock.