Improving education involves improving the approaches used by teachers, whether teachers already employed or new teachers. These kinds of things don't change overnight, but they can be changed over generations. Studies are, in theory, an effective way to determine what aspiring teachers should know and apply.
I don't think driving down the advantages of becoming a teacher is an effective way to improve performance. Many people interested in making a difference would, rightfully, forgo being a teacher for their own sakes and take a different approach.
Most teachers are shit at what they do and that won't change.
There are too many advantages in a lot of countries for becoming a teacher (civil servant) - salary excluded.