institution will make decisions according to their interests
Yes, but it is possible to keep them in line with the masses' wrath. While the masses themselves are so stupid that they can't make any adequate decision at all.
Haven't you talked to people? The opinion of the masses is BAD. Most people are crazy stupid. The rest -- don't have enough information to form a good opinion. We really need (except for trivial cases which are many, but still far from all) "professional opinion makers". Party.
What was their reasoning? As I understand many such experiments are conducted on de facto dead people: they have a dead brain, but other organs are mostly intact and working.
There is a huge difference between making an adequate decision and simply detecting that the current decision is shitty and starting wrath.