I’m reading his post the other way around: I think he is bitching and moaning about having to offer a lot more money to attract somebody from the competition.
The situation were somebody has already chosen to leave and the opde employers offers more money as a last ditch effort to keep that employee is a whole different affair with, as you pointed out, the whole element that them offering you more money when you’re about to leave means that they’ve knowingly been underpaying you all along.
Any “solution” to “protect” the Commons that involves private ownership of it is always meant to make somebody very wealthy from it.
The original Commons (things like pasture spaces with no owners and shared use by the community) were all stolen from the community and given owners already way back in Monarchic times (for example, via Inclosure Acts in England) and Capitalism is just a continuation of Monarchy were the reduction of choices for the riff-raff is a bit more disguised so that people think they are free and hence are more productive for the Owner Class.