I think people overestimate the short term impact of C-levels in these giant organizations. Google isn't run like a startup anymore. There is an existing compensation structure at place that pays employees differently based on the location they are working in. The HR and legal department has probably a pretty firm stance on assuring these structures are applied fairly and unequivocally. And if the C-suit is presented the options of cutting pay of some or raising pay of many others, we all know what a business would go for.