I just realised that we need to change the description of what we're trying to do.
Instead of thinking in terms of scarcity, we need to think in terms of abundance.
It's not subsistence farming, growing your own food is independence farming.
Making your own things is not subsistence manufacturing, it's independence manufacturing.
i can't remember what it was called, but i read a Cory Doctorow story, set in the USA,where the use of automation caused mass unemployment robotically-run prison camps, but a group of people set up a kickstarter where they bought Australia, and used automation to create a world of abundance, and then carried everyone else across one person at a time.