So cops are like any other Union or government job.
The ACLU obtained data also finds that African American and Latino neighborhoods also experience more violent crimes, resulting in more urgent emergency calls
Likewise, nearly all of the predominantly minority districts had more Priority 1 calls per officer when compared to white neighborhoods, which largely explains the continuing disparity in response times. Beat officers in minority districts have approximately 1.5 times more Priority 1 calls than beat officers in white districts. When special unit officers are included, the disparity is still 1.4 times greater. For example, the minority district of Grand Crossing had 2.6 times more Priority 1 calls per beat officer in September (23.7 calls) than officers in the white district of Lincoln/Foster (9.1 calls).
http://www.aclu-il.org/newly-released-data-shows-city-continues-to-deny-equitable-police-services-to-south-and-west-side-neighborhoods/
Until certain neighborhoods reduce their crime (10 calls per night in subsidized housing units) I don't know how they can suppress cops' survival instinct