I know this is the mainstream, but all of this reads like total nonsense to me.
1. Price changes carry important information too. What if demand stays the same but price still goes up? It could there is too much money, or supply is constrained or a new tax was imposed in the chain, or something was banned or the market is simply inefficient.
2. Low rates are sign that money has been tight? Maybe in a world where rates are determined by a market, but right now the rates are whatever the Fed commands. If the Fed wasn't suppressing rates, all rates would be much higher. Further the demand for money is always infinite. Ask anybody on the street if they demand more money and 100% will say yes. Why doesn't the Fed increase the money supply for the random Joe on the street, but does so to cover unsustainable liquidity commitments made by banks?
3. Interest rates certainly drive relative prices as they widen and shrink the gaps between those on fixed income and everybody else. As such the different cohorts evolve different utility functions and preferences. For example certain asset prices can go higher than the price of food from interest alone.
4. Both inflation and NGDP are broad aggregates that clump together the top 1% with the rest with no regard of inequality, climate change, social unrest. It's easy to slip into a mode where the top 1% does extremely well while 99% are left behind and rioting, all satisfying the inflation or NGDP target. A mockery of a feudal economy in a way. And this is where we are heading.
5. We can prove this one as being false. Money neutrality has never been demonstrated in the long term. In fact most forms of money ended up guided by politics, hyper-inflated the supply, was banned, price-controlled or otherwise collapsed due to some inevitable populist political decision.
It's pretty funny how the Fed keeps telling us they look long term, inflation is transitory and markets will work it out in a few years without intervening. But when the repo market crashed they didn't wait "for the market to work itself out", they rewrote their whole rulebook and launched support facilities the same day.
By now it's clear they are making it up as they go and they are just dominating the system with increasingly excessive interventions into a self-exciting oscillation. The Fed increasingly need to resort to breaking the law to achieve their goals. The Fed is only allowed to buy government-guaranteed assets with the full faith that they will be repaid with taxes. They are not supposed to buy mortgages, ETFs, junk bonds, muni bonds. They've had these discussions in the past and determined it's against the federal reserve act. There is no doubt that the authors of the act never intended for this to be possible and the states wouldn't have even signed on the act if it was presented to them in such form.