Shelter, well that's a huge variable: building your own house is almost impossible with many regulations that require a certain expertise to navigate. But once you have food, shelter—and friends/family—you're in a decent spot from a survival standpoint.
We don't have to live like the Amish, but perhaps a happy medium can be found, by being less dependent on the economy. Instead of buying 100% of your survival needs, perhaps it's possible to buy 50% of them and make the rest yourself. With the better telecommunications we have today, I often wonder about a society that's only 50% plugged in to the economy—and 50% self-reliant.
Disclaimer: I'm no macro-economist.