I would expect social sciences in the university level will do reasonably well in this format.
Could, but could also not.
You could just as easily point at the current business attitude in society which tries to churn out pre-programmed little consumer units that don't think for themselves. It's really not a left-only thing.
Lots of businesses are run by lefties. And business tries to sell you stuff. I don't think their marketing approach changes how people should think. TV ads indoctrinate you for a few minutes each day, but school is 6hours.
I mean, what is this Khan Academy you speak of?
https://www.khanacademy.org/
Yes. The system ought to naturally predispose itself towards helping people teach each other. To make learning a collaborative effort where you get to pass on what you've learned if you are at all capable of sharing your understanding of things. Much like wikipedia, we can teach people how to become intrinsicly motivated to this goal instead of extrinsicly motivated.
Wiki is funny because often enough the sites of European politicians and other figures get whitewashed or otherwise changed on Wiki. Also controversial topics and people .... well.... it's not just that sharing of truth is a motivation. But that's OT