There's also a bunch of PE money in the space for specialized vehicles, leading to the usual consequences. Fire trucks are the canonical example. Shittier trucks that take 3x longer to get and are dramatically less reliable.
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I think there's more to it than just evil PE
A rig that was $500k in 2010 is $2-2.5M now. That’s “cheap” —- volunteer fire companies tend to pimp up the trucks (usually they are paid via grant), cities are cheap on capital spend.
It’s a squeeze play as if you don’t keep the trucks up to date with modern gear, insurers will raise homeowners premiums. Bad look for the mayor.