Earlier quoted context omitted.
Ok but during a crisis what's the alternative? The alternative now is to disconnect the systems from the possibility of contagion, but the nature of crisis is essentially an acknowledgment of a failure to achieve in those efforts. So what then, really?
The alturnative is letting things fail. It causes a lot of pain in the short term with people losing their jobs and general economic fallout. This causes a lot of suffering. But on the other hand, the rich will lose more, and during the rebuilding a different set of people will gain the upper hand and end up on top. It's hard to get the political will to actually allow what needs to happen to fix wealth inequality.
Currency collapses, bank defaults, asset freeze-ups, international trade stoppage because of debt/credit changes, strikes and work stoppages, demand collapses.
Sometimes do nothing is fine, like the video game crash of 1983. But when it's systemic and big, that strategy has collapsed entire countries