When it comes down to it, if we have a Depression, many people will find out what they actually need to survive. Many communities will learn to rely on each other, probably coming down  to batering and trading to get what you need. Basic needs are food, clothing, and shelter. People will buy or trade locally, staying within thier area to get the basics. Transportation will be driven down to a minumum. When my grandmother went thru the Depression, the family only went into town once a month to buy basic necessities and grew many of the vegetables they liked at home. Things like sugar and flour were rationed to only being used for baking bread, canning< making jams or jellies> and/ or when company came. Grandma darned sox and underwear, and used a washboard to wash the clothes. People today will have a hard time doing without things they take for granted. Thats probably why there is such a movement for learning things our grandparents took for granted.
Rammy