Not quite the same formulation, but I’ve read the argument that paternal leave should be equal to maternal leave, and that both should be mandatory, because otherwise it creates an incentive for companies to hire men rather than women who might make use of maternity leave. I can see a similar argument for all workers, so that there isn’t an incentive to hire people who will never have children over those who will. Of course, all of these scenarios presume that any companies would willingly provide any leave whatsoever, which is already a fantasy. A company will only provide as many benefits as it is forced to, and a functioning regulatory state is the only entity that could force such compliance.