Technological fixes will not be adopted unless climate-related externalities are internalized into transactions, because of the tragedy of the commons. A political fix is a necessary prerequisite to the adoption of any technological fix.
[1] http://ec.europa.eu/eurostat/statistics-explained/index.php/...
If we're going to see reductions in emissions for economic reasons, we need emissions to cost something.
Political "fixes" are by nature temporary in the scheme of things. Regimes come and go, governments rise and fall, etc. They can possibly serve as useful incentives in the short term to drive certain changes, assuming there is sufficient faith in the longer term stability of the political "fix". Such faith has been shaken due to various reasons.
Technology, on the other hand, does not regress so easily IMHO. A technological advance that is sufficiently compelling - say fusion power for the sake of a dramatic illustration, can make previous "dirtier" technologies obsolete, and price them out even in the presence of improperly calculated externalities.
Another way to put this: the asteroid does not care if your financial markets have factored it in the models or not. It just hits you.