The firemen let the house burn down in a place where there was a fire department in the city, but no fire department to serve the homes outside of city limits. The city couldn't tax people outside of town, so when the firemen responded to calls outside of city limits, the out-of-towners got that for free. The city asked people who owned property outside of town to pay a low annual fee for service. The homeowner whose house caught fire didn't pay, but he offered to pay the low fee to the firemen when they arrived. They couldn't do that, because no one would pay unless they had an emergency. It would be like letting people buy retroactive car insurance after an accident.