The militarization of law enforcement doesn't mean much, e.g. look at how they completely loose there shit in the face of one disturbed, not very clever or effective assassin like Christopher Dorner [ADDED: there's a lot of cargo culting here; giving 10 police officer M16s/M4s, SAWs and grenades does not magically turn them into an US Army infantry squad]. At the other extreme, we the people can completely swamp them in a matter of hours, but of course motivating us to do that would be quite a trick.
"Advanced weaponry" is of no use without the will to use it. As an extreme example, a few nukes could terminate ISIS with extreme prejudice and collateral damage, but I don't know of any serious "hawk" even suggesting [WAS: advocating] their use.
I have grave doubts about your closing point, "a last resort if inequality continues at this rate"; is that so bad it's worth killing millions of people to merely attempt to fix it, with many and perhaps the most likely end results further emphasizing it? For that matter, who/what groups are going to start pulling triggers?