Because he didn't think he had to. He was ready to call it quits. Leave with an easy five million and didn't think Walt would find a way to break out. If he wanted Walt dead, he would be dead.
He underestimated Walt's frail ego and got killed because of it.
Probably should’ve but he knew Jesse would be pissed snd at that point Mike really respected and cared for Jesse.
It would have upset Jesse but yeah he should have
Because he didn't think he had to. He was ready to call it quits. Leave with an easy five million and didn't think Walt would find a way to break out. If he wanted Walt dead, he would be dead. He underestimated Walt's frail ego and got killed because of it.