There is no limit to "desirable jobs", and "desirable jobs" are not a resource. Your argument reads a bit like "there is no such thing as day, because sometime

There is no limit to "desirable jobs", and "desirable jobs" are not a resource. Your argument reads a bit like "there is no such thing as day, because sometimes it's dark out". Just because some aspects of life are zero sum doesn't mean all aspects of life are...