I was watching AngryJoeShow's Angry Rant about Destiny. He was talking about Strikes, and then he brings up the question, why doesn't strike bosses drop loot. I was wondering the same damn thing. Bungie you need to add this, it makes perfect sense. Here is the link to AngryJoe's video. https://www.youtube.com/watch?v=gzopWRXK_r4 He has lots of good points. I am focusing on why Strike bosses dont drop Mandatory loot. They still have a chance to change this, it would be a great thing to do, a 100% drop-rate, but its random depending on what LEVEL strike it is depends on what drops.
EDIT 1: After killing the boss he should drop a gun for example, or armour, depending on your Level decides what gun or armour you get and how good it is.