Not that I necessarily agree with the views of the parent post (I don't know them well enough), but I think you're looking at "now" to argue the impossibility of "then". In other words, I don't think our current society really reflects much of what society will have to become in the fairly near-term future.

We already have effectively unlimited energy in the form of the sun (we currently collect only a tiny, tiny fraction of its full output), I don't see how teleportation factors into it, food production seems likely to become almost entirely robot-driven within, say, a 50 year time-frame (by competitive influence), we're progressing by leaps and bounds in the area of human health, and population management will obviously be necessary to balance quality-of-life and resource concerns.