You don't have any bites here yet XQ so I will assist.
This is a very good topic of discussion in my opinion; one which is more appropriatley discussed here on it's own thread.
I agree with you about some of your comments regarding "high control groups" in so far as a comparison to full cult status. Certainly there are some similarities and overlap in so far as controling activities and suppressing those who challenge authority (to name a few).
Definitely the military (as one example) have been accused of certain tactics and methodologies which have subsequently been challenged openly and publicly.
I suppose one could even extend the analysis to the prison system and the guard/warden-prisoner relationship. I am not a fan of aggressive or threatening tactics used to make one submissive although sometimes this is necessary (in the case of the criminal mind).
Some distinctions only between the military/prison system and a religious cult:
With a cult one would typically see these methods used to achieve a financial end or goal. As well, a cult would be unregulated in it's "high control tactics".
Now let's only deal with "regulatory aspect" of tactics which are found in "high control" and perhaps coercive but not illegal.
In the military or the prison system if the public became aware of these types of tactics there would be avenue for public outcry or at least public discussion with an end result being potential political interference and a change for the better.
We have seen this over the last five decades in several areas of the military and the prison system. Not only that, we have seen a vigorous response from civil liberty advocacy groups. That is not to say that change has come easy rather it has been 2 steps forward and one step back all the way. Nevertheless, their exists an outside regulatory framework with groups like this who in the end are very subject to "the court of public opinion". If an individual from within those groups is being treated unfairly they have an ability to get a lawyer and get some outside intervention should that intervention be warranted.
In a religious cult there exists no outside regulatory framework to monitor or effect change for the better. Only illegal tactics can be dealt with by outside regulatory agencies and only if the information is not deliberately suppressed by the cult. Should a member feel that certain "high control" tactics are unfair or oppressive but not necessarily illegal, then they have no ability to get outside advocacy to affect an intervention. Now add to this condition all the other conditions which exist in a cult and a cult member is truly helpless and totally at the mercy of the cult leadership.