The arithmetic for comparing deployed military and private contractors is probably similar to the comparison between full-time employees and freelancers.
[1] http://www.sfgate.com/bayarea/article/Chip-Johnson-Oakland-m... Too add insult to injury the people were chosen out of the crowd to get to apply, almost assuredly friends and family of existing fire fighters, but that's "just" a corruption issue, not the larger issue that demonstrates how much over market these rates are.
Follow the link to read about a recent case of abuse by the SFPD. Notably, they beat up and put into solitary confinement a person who they acerbically associated with "wannabe billionaires"
https://medium.com/human-parts/9f53ef6a1c10
I am for supporting police with a good wage, but there are astonishing increases in police militarization and abuses of power. There should be a real balancing force, like with other professionals. One that works.
There is a lot of propaganda to that effect, but most of their actual activity does not support that. Solution rates for strong-arm robbery and serious property crime are low, and the prisons are full of small-time drug sellers.
It also makes no sense that police officers need to live in the municipality in which they work unless it would help reduce the crime rate.