On further thought, Bush has actually pursued two main objectives:
- Insure that fear of terrorism continues so as to be a recurring element at every election cycle.
- Insure that a hot war is active during his entire administration. This enables him to claim status as a "war president". This is used as a cudgel against anyone who tries to criticize him.
These two items he has used repeatedly against his critics and to encourage the masses to vote for him and his party.
This explains his lack of enthusiasm in capturing Bin Laden. It also neatly explains his half-hearted war effort. The lack of sufficient numbers of men and equipment may be an effort to hobble the effort and draw it out. A war that is won and over before his presidency would not serve the purpose of silencing his critics.