Cuts to workplace perks came first. Paid time off may be next. In the latest sign of employers flexing their power, at least two high-profile names are shrinking variations of the highly popular benefit. Zoom this year reduced the number of weeks of paid parental leave it offers, while Deloitte is also planning to do the same — and more — for select groups of workers starting in January. The changes could be an early signal of a broader shift: In a tight labor market , even highly valued