Chronically unemployed capital is actually a much bigger figure than unemployed labor.
Labor, on the other hand, is almost exclusively unemployed involuntarily. Did the very wealthy not have a strangle-hold on government policy this would be a very good argument, in times like these, for either taxing their idle wealth. This is one of the situations about which Keynes wrote where actions entirely rational for an individual when taken simultaneously by almost all those in the position to act, collectively prove disastrous. As the Dutch said while fighting the Spanish: "It is not necessary to have hope in order to persevere."