The New York Times has a big scoop: Economic incentives incentivize people.

Mr. McMullen, 33, is part of an exclusive club: the semiretired tech millennial who left California after getting rich. Like many in this group, he is a newly minted multimillionaire who became wealthy by working for high-profile San Francisco start-ups like Uber and Lyft, which are now about to go or have just gone public. Once their wealth was assured, these tech workers quit the companies and fled California, which has the nation’s highest state income tax, at more than 13 percent, to reside in lower-tax states like Texas and Florida, where there is no personal state income tax.