I learned to can for this reason. Currently learning to salt cure our meat.
Even if most were self sufficient, back then there wasn’t as much expense. Even us who do know those skills couldn’t live like they did back then! DFCS, IRS, etc... prevent it. There has to be some means to income for property taxes, high cost of medical care, etc...
But no, most would turn to looting.
Which is also why I know how to shoot a gun. ;o)
Your lids will run out. Learn to dehydrate using the sun. Also, try smoking your meats after you brine them. They'll last longer, and the smoking keeps the insects out.