Management can only do this, if the mentality of a society is, that workers work against each other rather than with each other. The fear that they easily find someone doing your work better or cheaper.
They don’t. Because if they did, they already would have.

And that workers think that they are easy exchangeable, not seeing that onboarding a new guy costs the management efficiency, that what you learn while working makes you more efficient and makes you worth earning more.