Something strange

This post is about something what I find little strange.
A farmer who produces the most important thing is the poorest.
A Teacher who teaches his students and gives them ability to achieve something in life is also poor.
But film star like SRK Salman who actually does nothing but are richest.

Why is it like so the person who produce most important thing is underpaid but who does produce least important things are overpaid.

Though can't generalize everyone but in most cases its true.

Its not like that those who are overpaid have less talent than others , but I think they one extra talent of selling their works.