I don't think this is an AI specific problem. Small companies have never been able to compete on salary with Google, Netflix, etc. They need to focus on growing talent instead of buying it. And that talent will leave eventually, so there also needs to be a focus on culture, and a pipeline to replace people. AI won't change that.
There aren't going to be enough experts to go around. They'll start demanding millions in salary and all of a sudden the advantage is gone.