If he didn't have helmet to helmet contact, Burfict wouldn't have been concussed, most likely. Schuster's helmet hits Burfict right in the face mask, with Schuster leaning in with his foot planted for leverage.
Here's a similar play with Thomas Decoud blindside blocking on a Desean Jackson punt return at Cal:
https://www.youtube.com/watch?v=lo9e2Jf7R0o
It wasn't flagged (the rules were different then), but both players were concussed.
And, like Schuster's block, it wasn't necessary for it to be so violent; all either blocker needed to do was redirect the defender to spring their teammate; they already had the position they needed. If you're at all serious about protecting players, that kind of play should be illegal, should be fined, should result in suspension.
(Trivia: The UCLA player was Korey Bosworth, nephew of The Boz).