Well, the economy in the Soviets already collapsed even before the disintegration. In fact, the economic downfall was one of the main reasons for the collapse of the Soviets. The only difference was that the world finally saw what's happened behind the iron curtain. The current world economy is a very different story.Doesn't work like that.
Read whats happened in eastern europe after Gorbatsov let the monkeys to grab the power.
Everything was in place, only the (information) connection damaged between the countries.
Enough to collapse the economy, the level of living and to take 20 years to recover (25 for Poland ).