There's no incentive for any government agency to be properly prepared for a disaster unless they are certain it would impact all of their jobs. Being prepared means that you limit additional appropriation possibilities in the future when an actual event occurs. So, their economic policy is essentially:
Maximize funding at time = 0, do as little preparation as possible that involves human planning, spend capital on unnecessary items, wait for event to occur, advise CONgress they did not have the necessary funds, rinse repeat ad infititum.