Plenty C level people know this is the eventual outcome. They just also know that the runway is likely to extend beyond their working career because they control most business decisions for the foreseeable future.
They still operate on a relationship basis with ownership/capital while managing the company on a Netflix performance model for everyone else. Those relationships are likely to stay in place until both sides age out of the industry.
I've worked with a number of C level folks hired into companies from low cost regions and they have all been utterly stellar. This is coming, just not for the current generation of senior execs.
For example in India it used to be only outsourcing, but now they are launching their own startups as well, some quite succesful. Slowly the capital will start accumulating there as well. And that is a good thing, for global inequality.