It is difficult to know these days whether a disaster is an act of God, or engineered by man.
And sculpting disaster is far more complex than simply population control- war boosts economies, for instance, and funding after a disaster can have political influence.
I certainly think there is much more going on behind the scenes than is evident, and I believe much of it is not in the best interests of the ordinary working person.
Obviously governments have learned the power of taking advantage of the emotional currency disasters will provoke in people. So if one does not come along at an opportune time, certainly they can be made to order.
Which brings up a question. What, exactly, is the GOAL of terrorism?
Governments tend to become the equivalent of living, breathing organisms, and soon place their own survival over all other interests. They would likely name it something innocent and official, like, oh, I don't know, how about maybe "national security". Seriously, anything have a higher priority than that?
I think the more we would REALLY know about our own government and what they are planning (and HAVE planned) behind closed doors, the less we would like.