You're taking a very precise definition of 'neo-classical economics' which isn't what I was seeking to defend, so I understand your scepticism.
At university I had as my main text book Lipsey's 'Positive Economics', which was an attempt to introduce the basic concepts of economics that pretty much universally agreed. It's those concepts, which are, as much as anything can be proven, the 'scientific basis' for economics.
Just occasionally we get countries carrying out a strikingly new economic policy that allows us to see what happens. A recent example of this was Erdogan's refusal to raise interest rates despite rapidly rising inflation in Turkey. After several years of this, he finally returned to what every economist was telling him to do, and inflation is beginning to come under control
https://ancillary-proxy.atarimworker.io?url=https%3A%2F%2Ffortune.com%2Feurope%2F202...
In Chile Pinochet's adoption of market economics after the coup against Allende lend to short term pain but long term gain, a pattern which was repeated when Poland emerged from socialism in the 1990s, creating what is now a dynamic economy.
Etc. etc. No doubt Bernanke did indulge in a degree of hubris in 2007; that doesn't mean that the central ideas of economics are flawed.