The OP is a less than zero to publicly berate the Gedolei Roshei HaYeshivos and to give them instructions on how to run their Yeshivos. Does he seriously think the Gedolei Roshei HaYeshivos didn’t ever think of his brainstorm?
It would have been half an issue if he suggested this to the Gedolei Roshei HaYeshivos privately; but who the blazes does he think he is to give a public reprimand or even public collective advice to them on how to conduct their Yeshivos?
Now let’s have the Zionist army reduce time off for all soldiers, secular or not, and have them all spend 20% of their off time in a Yeshiva. Rather than trying to change the less than 10% of the people on how much learning they need to increase, when they’re already dedicating their lives for years of dedicated full time Limud Torah, work on the over 90% who spend zero time on Limud Torah to give an hour a day or even two weeks a year dedicated to Torah.