I think what he was going for was that you shouldn't solve the overworked problem with hiring. It indicates you need more manpower, yes, but it's also indicativ

I think what he was going for was that you shouldn't solve the overworked problem with hiring. It indicates you need more manpower, yes, but it's also indicative of planning and resource allocation problems that need to be solved first. Adding more people before you solve those problems will probably make things worse. Things need to be properly divided and conquered, some things may need to be put on the back burner. It often indicates that you haven't split up the workload into manageable pieces, and are instead trying to get it all done at one time. Someone might now jump and say 'sometimes crunch time is necessary!', and I would reply that if you're in crunch time you've just demonstrated the exact issue I'm describing. I think he's essentially restating 'the mythical man month' for a modern environment.