They could set up a ten t city in the prison grounds and demand Bibi spend more money on prisons, say its for social justice and try and attach it to the protests and you can try and justify any demand. In the new Israel obsessed with social justice prisoners should be entitled to internet and tv in every cell, a mini bar, fresh food delivered straight to their cell on demand. I really don't think there are many Israelis who are going to be demanding better conditions for prisoners.
Islamic State blows up tower tombs in Syria's Palmyra (Reuters)
from the article: Report reveals harsh condition in Israeli jails