That's a big problem for sure. Unfortunately, the collapse we'll get if we do not rapidly transition to a sustainable economy is likely to be much, much worse. But your point is a good one - how do we manage an orderly transition to a sustainable steady-state* economy when the changes needed to do so in the time we have are likely to be so drastic, they will cause a collapse of any social system that tries to make them?

*We can probably eke out some more economic growth while cutting resource consumption, but sooner or later continued growth and finite resources become an impossibility. If nothing else, we'll eventually generate too much waste heat from energy production.