That's not the way it works here in NJ. The volunteer fire departments have just as good or better equipment than the professional groups.
Given a choice between higher salaries and better equipment, the unions tend go for higher salaries. Then they use the excuse of old equipment to get a higher budget, most of which goes into higher salaries. Rinse, repeat.
Money given to the volunteer groups goes into training & equipment. They tend to have good equipment.
There are departments around here that still have 70’s vintage apparatus.