Maybe... This wasn't a defence of socialism, this was an exploration of abundance economics...
Draug, thanks that's very useful. I'm going to guess that a part of the low cost of food is government policy. (subsidies to growers, combined with any other policies aimed directly at keeping food affordable - because a well-fed population is an apathetic population... Or however cynically you wish to look at government policymaking...)
Making transport capacity abundant would be a harder task i fear, the easiest route would be to bring food growing closer to human occupation - but i don't think that suits human transport needs (people visiting each other, optimised by urban living, just as universities might optimize sharing of knowledge by focusing specialists in one area)
Local growing (ie having your own garden) will only gorw a small percentage of our food, so another solution is necessary - and while i can imagine a solar powered super train, it think the development investment would be prohibitive. (note we do treat sunlight as an abundant resource, nobody pays for it, nobody worries that there will not be enough and it lights our home for half of every day... Also does a lot of heating... )
Abundant power would really be a game changer here, but that will take some doing.
Ok, let's assume we can provide logistic subsidies for transport, storage, and distribution to your local market/restaurant (i'm still ok with paying for the chef, waitress food prep etc, just free to take food home and prepare it yourself - notice you can now do away with food stamps entirely, so there is some saving)
Still there are problems, how do you maintain food production levels? How do you encourage a minmisation of the cost? Obviously you're talking about paying for any new research from public funds but at least the new tech is not owned by a small collection of corporate entities... What do farmers as civil servants look like?