That's a good point. It is not political suicide for those leaving politics. But it is political suicide for those that are elected or want to be re-elected.
For example, Bush Jr left the economy in a mess but he was a 2 term president with no political future. So Bush Jr is fine, but Obama who was elected and who wants to be re-elected has to re-inflate housing and stock prices. That's why the housing prices and stock prices won't stay low for extended periods of time. That is until we arrive at the limit of our growth/expansion when no political or economic measure will do any good.