Nobody needs "new powers". We need new laws to prevent these orgs from becoming too big to fail in the first place. What happened to isolation of depositor funds and investment funds? Oh yeah, in the US we removed that law (Glass-Steagall) under Clinton.
In his book Antifragile, N. N. Taleb argues that if you work for a Too Big To Fail (G-SIFI) institution, no one working at such an institution is allowed to earn more individually than the highest paid civil servant. Incentivize corporations to stay small so they can earn more money.
And for fuck's sake, can we go back to isolating depositor and pensioner/fixed income money from the money that banks use to gamble in the capital markets? Until we do, our system will continue to crash and Central Banks will continue to steal from the middle class. This N Korea stuff makes me wonder if the puppet-masters have fully realized this and are planning a diversion.