The government was never to be able to function efficiently and in a "timely" manner. It was specifically built to be slow and reactive. And even with the PA, the events of 9/11 would have not been prevented. The government heard rumors, they gave it no weight because when the hell have terrorists ever done such a thing?
Trust in the government is one of the dumbest things to ever do. It is not meant to be trusted, never was. The founders warned us of the dangers of government, told us to watch it and constrain it because it will do exactly this. Anything that wields the soveriegnty and power of the People can not be trusted. It must be watched, it must be constrained, it must be limited. A concept once understood and championed by conservatives.