Other than to add more sinecures for the politically connected…
Are you under the impression that government contracts for vehicle maintenance are immune to becoming sinecures for the politically connected? Only mechanics are subject to this possibility?
Typically people don’t live in a world of extreme positions whereby one occurrence of outsourcing being good (or bad) means all of them are. It is obvious the position that I have. Government has outsourced too many jobs to the private sector and the effect has been to enrich the business class at the expense of the working class.
That's foolish beyond measure.
For anyone who works in the military industrial complex, the income difference is stark.
Because, as we have seen, outsourcing these kinds of services is rarely cheaper and never actually better.
By keeping it in house, you can hire people correctly for the volume of maintenance you do. Your people become very good at the specific needs and faults of your system (see: Why SF firefighters make and repair their own ladders). And when you genuinely need something, you can redeploy your labor.
All outsourcing does is create an extra middleman whose mouth you must feed and whose workers you have no control over.
Executives, of course, loved outsourcing as it let them crack up the unions.
And for something like a police department, the efficiencies disappear with modern vehicles which need less maintenance.