What the hell do you mean it is better to die and keep your respect? I am thinking Mike wants to provide for his grand kid because clearly, his son is dead and the mother can't properly provide for the kid. That is the whole reason for him doing all that dirt, all he had to do was talk it out, he could gone on the run, provided console to the group for a fee, he went way out of his way to start trouble with Walt, being a bytch and alive to provide for my family, yeah i will take that any day than being dead and not being able to a damn thing. You hate Walt so much that you would provoke a man to kill you, a man you know is dangerous and smart, Walt held all the cards here, he gave Mike the info to run, he could have let get caught, he gave him the bag, he wanted the names of the other guys and out of loyalty to them, you going to betray your own family
Any body in that position would have given up the 9 and lived to provide for his family.