Can you cite a source on that? As a software engineer for a major defense contractor who works closely with other major contractors, I can say with some degree

Can you cite a source on that? As a software engineer for a major defense contractor who works closely with other major contractors, I can say with some degree of certainty that being paid overtime is certainly not the norm, and 60 hour weeks aren't terribly uncommon during crunch periods. We have to report our hours accurately, but they've always been pretty clear that we're exempt employees and so they're under no obligation to pay us overtime. (They sometimes will, at a manager's discretion, though rarely is it 1:1 for hours worked)