Obviously these kollelim are paying very well that someone looking to continue learning can do so comfortably.
(I heard that the closer ones/ e.g. Baltimore pays in the 1500 range plus covered rent, and the farther ones/chicago in the 2000 range plus rent.
Also from what I heard, in Chicago they help significantly those who choose to buy a house.)
The question is that is this really their only option to stay in learning (without their wives working like a chicken without a head.) , or is there some other reason so many chassidishe yungerleit are doing this?