I don't think the healthiness of any specific industries (like banking and finance) has anything to do with capitalism. Just like, say, manufacturing CPUs has n

I don't think the healthiness of any specific industries (like banking and finance) has anything to do with capitalism. Just like, say, manufacturing CPUs has nothing to do with capitalism. If you have a bug in your manufacturing process then your company might go broke. Likewise, if there is a bug in your financial rules, financial institutions might break down. That has no bearing on the validity or invalidity of capitalism as a whole.