After his Stop BEZOS Act appeared to help spur Amazon to raise pay for its workers, Sen. Bernie Sanders launched a similar effort Thursday that targets Walmart.

The Stop WALMART Act — introduced by both the Vermont independent and Rep. Ro Khanna, a California Democrat — would block big employers from buying back stock unless they pay all employees $15 an hour. Companies also would have to ensure that their CEO’s compensation is capped at no more than 150 times the median pay of all workers, as well as allow their employees to earn up to seven days of paid sick leave.