* It is a political agenda, not for jobs and economical reasons.
* Not feasible judging for most HSR operations in the world esp. with our low density of operation and our efficient air and land transportation.
* Who wants to work in the tough conditions in laying rails? It is easier to receive welfare. Remember, the last major railroad projects were done by the Chinese even you do not see any yellow face in the milestone picture.
There are many other reasons I forgot as my post was deleted for no reason at all.