Well probably OP won't be affected because management is very pleased with him and his output, why would they fire him? Hire someone who can probably have better output than him for 10% more money or someone who might have the same output for 25% less pay?

You think any manager in their right mind would take risks like that?

I think the real consequences are that they probably are so pleased with how productive the team is becoming that they will not hire new people or fire the ones who aren't keeping up with the times.

It's like saying "wow, our factory just produced 50% more cars this year, time to shut down half the factory to reduce costs!"