The desire to have children versus the desire to have sex not withstanding...the desire to continue your civilization has to come into play at some point.
Perhaps they'll shuffle people around and have a orphanage ship, with teachers and nanny's have a kid, dump him on the orphanage ship until they're of age and ship them into the profession where people are most needed!...Pilots. (Hmm...Annie in space?)
Of course, if you want your kid, that's a different story, and perhaps the government should offer incentives to have kids.
In any case, Boxey should re-emerge in the fifth or six season and become a pilot. So he can die on screen for all to see!