It is the common opinion that the credit crunch made people at many countries to vote left parties because the socialists are believed to be more effective in fixing economy. Though I am not going to deny the fact of this questionable belief it seems to me that the shock effect is not about lefts themselves but about switching a previous party to a new one, whatever it is.
I mean, countries where left-winged parties obtained power recently were ruled by conservatives before the elections. And on the other hand you can see countries that got lefts in charge when the economy crumpled had changed them (or are obviously going to, like UK) to conservatives.
People may not believe in saviours but they surely believe in saboteurs and wreckers.