There are multiple exit permits and single exit permits.  My understanding is that employers can give the multiple exit permit to their employees and this permit will let them come and go as they please with in a year's time frame where as a single exit permit is granted/denied by the employer right before the employee wishes to leave Qatar.  So if I understand this process correctly, the method is already in place to allow some freedom and flexibility to leave Qatar but I'm not sure how many employers give a multiple exit permit to employees. 

The whole NOC thing to change jobs is another issue. I think a good program would involve the employee staying long enough for the employer to recoup any expenses incurred to bring the employee to Qatar or the employee would reimburse the employer for those expenses before leaving his employ.  There should also be a reasonable amount of time for the employee to give notice so the employer is not stuck without someone.  It is not always easy finding certain people to fill positions in Qatar.  But I am completely against holding someone in a job against their will.  There should always be a way out.

What a strange illusion it is to suppose that beauty is goodness.
~Tolstoy~