Where are these so called skyrocketing salaries? If a handful of companies in the valley paying people decent salaries because they generate them billions, what

Where are these so called skyrocketing salaries? If a handful of companies in the valley paying people decent salaries because they generate them billions, what's the problem? There are hordes of capable tech people in the world,yet companies decide to establish themselves in the vicinity of these high paying companies and then complain about how hard it is to hire people,because they are expensive...Go figure.