Should Governments be rebuilding the economy - or developing a new, sustainable one?

Government funds now propping up "old" economic structures (commercial banks) and outdated infrastructure (cars/freeways) - and strategies like Emission Trading Schemes framed to protect polluters "to save jobs" - could be funding pollution-free energy systems etc to answer Climate Change, CREATING new jobs -- and an economy aimed at need instead of merely "created wants". But how widespread is awareness of options? And acceptance of Climate Change warnings?