Can you have a "Creation Mandate" without a "Marriage Mandate"?

Captain Sensible writes: If the creation mandate is "Be fruitful and increase in number; fill the earth and subdue it", then does that not include both a "marriage mandate" and "work mandate" (assuming you are fit and able and not any form of eunuch)?
Surely God requires mankind to marry, raise Godly families and partake in some form of work to manage His creation?
Once again, I am happy to be a marriage mandator (and a work mandator - but that part doesn't seem to attract any argument! Maybe because Paul warns us about a time when -- through the teachings of demons -- marriage is forbidden. But he doesn't warn us about a time when work is forbidden!).