Who assumes the obligation of providing "job security"?

Here and there, I hear discussion, read editorials and threads about this expectation called “job security”.

I understand how cool “job security” would be.

But often enought, people bring it up in the context that it is an entitlement.
Or at least, part of the social contract.

If that is true, who satisfies the requirement for Job Security?

Are farmers entitled to “Job Security”
Coal miners?
Cigarette makers?
Members of Congress?
The President?