This post seems to imply that there is a single "market salary" for programmers. That's not really the case anywhere - a green intern doing web programming is never going to have an equal salary to a greybeard doing consulting in esoteric niche areas (eg COBOL in banking systems). There's always diminishing returns for superstar talent in any field - a Fortune 25 CEO gets paid how much more than a manager at Wendy's?

The collusion between the big tech companies to drive down salaries for top personnel strongly suggests that the market salary for these people is actually higher than what they're currently paid. They're grade-A talent in a hot field, the fact that their salaries are high doesn't mean they're above-market.