[smm2000]

It can be zero sum game short term (<1 months) but medium term (6 months) it's definitely not zero sum game. Pool of applicants that can be firemen includes all able-bodied males (and potentially female) 18-50 which is 10 million pool in California alone. Good pay will attract out of state candidates too. I would expect training to take less than 6 months or so. Considering fires happen every year, California can have as many firemen as it wants (and willing to pay for) by the time next summer fire season starts.