Actually something more immediate will force change much sooner. You are not
going to like it: United Nations and Pentagon studies predict population
growth (the main driver of all economic growth) will create unsustainable
natural-resources demands as early as 2020 with global population exploding
from seven to 10 billion by 2050. So expect Depression Era austerity
unemployment and a new no-growth economy.
www.marketwatch.com/story/myth-of-perpetual-growth-is-killing-america-2012-06-12 Wall Street article on the myth of perpetual growth.