Theoretically, supply side economics. Demand side economics makes even liberal economists uncomfortable, because it's so closely tied to inflation of consumer goods. They would rather fund the industries that make the goods, so there are more goods (and jobs producing them).
It's clear that it isn't working, which is why a heretical sect of MMT economics wants to do demand side. It's a big change, the kind that takes a generation dying off to accomplish. Especially since it may not work. It's a genuine unknown, with the primary advantage that we don't already know what kind of regulatory capture it would cause. Which is enough for some, given how badly the current situation is fraying.
It's clear that it isn't working, which is why a heretical sect of MMT economics wants to do demand side. It's a big change, the kind that takes a generation dying off to accomplish. Especially since it may not work. It's a genuine unknown, with the primary advantage that we don't already know what kind of regulatory capture it would cause. Which is enough for some, given how badly the current situation is fraying.