In the 80s we started massive deregulation including killing Glass-Steagall, opening up banks to so destroy the global economy that we're having this discussion today.
Your history of regulation and relative wealth is backwards.
Edit: I'll acquiesce that the tax code is laughable, but mostly in how upper-class income tax levels are half what the middle class pays.
In fact, countries like the USA should give it a try again. It worked quite well for them last time.
What logic is this? "Anything which is not a designed system works fine"?
That said, "be careful" and "do nothing" are two very different propositions. Being careful may motivate doing nothing, or it may motivate doing quite a lot. While I don't think it was present in Hayek's reasoning, this frequently spills over into something that looks like "We're dealing with people's lives/rights here! How can you be so crass as to talk about numbers and make decisions?" When things are difficult and important, that's precisely the time you need to be most careful in your reasoning.
Abstaining is still an action. Proposals for reduced or constrained intervention are still proposals, and only deserve reduced scrutiny to the degree that they are supported by "we've done that before and it worked out well".
A century ago there were hardly any regulations or taxes. Today every segment of the economy is highly regulated outside of tech and nearly everything you can taste, touch, smell, eat or look at is taxed (often multiple times).