food: soylent green etc:

[addy]

i suppose a fair way would be a lottery. everyone gets fitted with an electron implant and at a certain age you enter a lottery once a year (against your will) and if you win the implant goes boom and blows your brans out. you then get scooped up and processed.

gives a new meaning to hunger games

If we go for the one baby per household approach we'll have to rework the system to make it function well with a topheavy framework i.e. more old people, less young people (since in countries where this is true, they seem to consider this a problem). You're right, technology will play a big role in making that work, among other things (in Japan, for example, the elderly are trooping happily back into the workforce since they apparently outnumber the younguns)