I'm of the opinion that Rick is referring to driving the cost of operating a police department. Large or small, city administrators (as well as county,state etc.) are concerned with the cost of litigation. As studies have shown, cameras greatly reduce the number of suits and complaints against officers.
I believe TASERMAC or someone posted that NYPD paid out more than 600M last year or so. Cameras can reduce that to about 10% of the amount paid out. But then one ,must take into account there are lawyers involved who are too lazy or incompetent to fight the cases.
Will be interesting to see how this plays out in a year or so after the cameras have been deployed in some of the major metro areas. Long and strong.