ICOT, I don’t either understand the large discrepancy in tuition between litvish and chasidish yeshivas. Perhaps it is explained by the costs of providing English/Secular studies. Maybe the MO schools put the most money into that, the litvish less but still more than the chasidish.
What if parents are unemployed? Or the parents jobs don’t even come anywhere near paying the tuition. Are the children refused entry to the yeshiva or even thrown out of the yeshiva??