The filibuster is making [Congress] less relevant. If you look back at the financial crisis, the lead response came from the Federal Reserve, because everyone understood that Congress couldn't move quickly enough.
Now I'm no history scholar, but wasn't the argument for consolidation of the Roman Triumvirate, and Augustus Caesar's rise to power upon dissolution of the Triumvirate, based largely on the argument that the Roman Republic couldn't move quickly enough? Once again, I'm not a genius like Ezra Klein, but it seems to me that Congressional bodies are large for the specific reason that they must move slowly, and to check the rash behavior of the Executive Branch.
Nor do I understand what exactly he wanted Congress to do? Quickly pass a law enabling the Federal Reserve to act? That would have slowed things, obviously, but what is not obvious to me is in absence of a filibuster, exactly what would Congress have been able to swiftly do??
Once again, I am not a genius like Ezra Klein.