He is probably afraid to venture out and likes the comfort of the status quo even if he has a crappy job. If you cannot make ends meet on your current income, though he probably should try to do better. Maybe you could set a time line with goals. I.e. by such and such time he will have identified and applied for x number of better jobs
I found with my husband that I must address and help him conquer all of his fears and objections to move forward