You do realize your answer is based on the pointed out problem. Let me put it this way, I am saying, "We should wear better shoes, and you are saying, even you don't like it, you are wearing it right now, and it does a decent job". Yes that is what I am talking about :)

Oh system programming does exist, and I can understand the role of C, what I am saying is, even we have a better alternative to C, people would still stick with C.

There is no economic incentive, you are right but the reason itself mostly economical not technical.