1) decide that limits will need to be imposed on our demographics and start a plan of population control. if that population is not already in effect (zika?)
2) let the market regulate itself, pushing people into poverty and reducing their fertility and life expectancy.
Once being supported by other humans is no longer a requirement for power, large portions of the population will be to the mercy of elites.
When that happens, it will be up to elites to decide what to do. They might be already deciding what to do (e.g: http://www.bilderbergmeetings.org/press-release.html, item #9).
They can either:
1) decide that limits will need to be imposed on our demographics and start a plan of population control. if that population is not already in effect (zika?)
2) let the market regulate itself, pushing people into poverty and reducing their fertility and life expectancy.
3) be altruistic and ensure wealth for everyone.
Personally I think altruism will not be a thing. The planet has limits, and within a few generations we will be reaching our planet's carrying capacity, this in the context of major nations accumulating armament (e.g: https://youtu.be/YoC0Xcjko0A?t=28m16s, https://youtu.be/rXSh3ur5XnQ?t=1h16m26s).