Or survivorship bias. Perhaps people who manage to graduate while taking heavy course loads are also the type that, as others say, are good at getting work don

Or survivorship bias. Perhaps people who manage to graduate while taking heavy course loads are also the type that, as others say, are good at getting work done in general. But the headline is "Why it pays to be a double major in college". This would not be true if graduation with >3.0 GPA becomes difficult, as graduating and getting a decent GPA are probably more strongly correlated with income than having two majors at some point.