Jobs independent of Economy?

One of the things the recent economic depression really drove home was the problems created by the economic version of the Larsen effect (aka 'audio feedback').
Suddenly the economy isn't doing too well. People can't afford to buy as many things as they did before.
Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut.
Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut. People without jobs can't can't afford to buy as many things as they did before.
Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut. People without jobs can't can't afford to buy as many things as they did before. Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut. People without jobs can't can't afford to buy as many things as they did before. People without jobs can't can't afford to buy as many things as they did before. Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut. People without jobs can't can't afford to buy as many things as they did before. People without jobs can't can't afford to buy as many things as they did before. Suddenly even more companies aren't doing too well. People can't afford to buy as many things as they did before. Jobs get cut. People without jobs can't can't afford to buy as many things as they did before.
Game Over
Yeah. See how that sucks?
If there was only a mechanism to eliminate negative self-amplifying economic feedback. In audio production, there's a few things you can do to prevent unwanted feedback. The economic version of echo cancellation could possibly even work on the same principle. Digital signal processors look for the originally transmitted signal that re-appears, with some delay, in the transmitted or received signal.
How would one implement this as an economics device? Well, if the financial world was entirely run through computer managed networks, this might not be that hard. Spotting 'echos', that is. A DSP will 'kill' the echo, but would canceling a transaction that fit the definition of 'economic echo' work well? How would false-positives be handled? I'm sure there's a economics paper in all of this, if not a nobel prize.