When the coronavirus closed schools and child care centers and turned American parenthood into a multitasking nightmare, many tech companies rushed to help their employees. They used their comfortable profit margins to extend workers new benefits, including extra time off for parents to help them care for their children.

It wasn’t long before employees without children started to ask: What about us?

At a recent companywide meeting, Facebook employees repeatedly argued that work policies created in response to Covid-19 “have primarily benefited parents.” At Twitter, a fight erupted on an internal message board after a worker who didn’t have children at home accused another employee, who was taking a leave to care for a child, of not pulling his weight.