MMT is wrong and bad. It's yet another Keynesian reformism, and the mainstream left attaching itself to it will repeat the exact same process as post-war Keynesian consensus. There will be a crisis that cannot be adequately explained by MMT. No one will know what the fuck to do. Austerity will become entrenched again in order to protect profitability. Whatever minute existence of radicalism that is growing will be brought back into reformist social democracy, or be purged.