I don't think that's the problem. Virtually every county, and I'm guessing every city over 75,000 has it's own flavor of SWAT, SRT, or whatever moniker you want to hang on it. That doesn't count the state police entities, game warden SRTs (yes, there are such things), Department of Agriculture, DEA, US Marshals, FBI, ATFE, and numerous other federal entities. The problem is not a shortage of manpower or equipment; it's a lack of willingness to go after the criminals that might actually shoot back.
I used to think that the political threats for cutting spending at the police departments was a bad thing. This story makes me think that cutting the police forces may actually be a good thing.