I haven't seen any comments from any libertarians on the Trickle-down theory before. Everyone seems to believe, that it was a huge mistake, and is what made the middle class and upper class strawmen.
They comment on it constantly. It's called "bailout".
Trickle-down theory is Supply-Side economics. Supply-siders believe in subsidies and selective tax cuts but still want big government and deficits. They fund it through inflationary policies and borrowing. Supply-side economics has been the single biggest propaganda tool used by progressives to attack free market economics and capitalism. It is frequently confused with and assumed to be Austrian economics. Sadly many Republicans latch onto it since it was the economic policy of Reagan and promoted by various conservative organizations.
A Walk on The Supply Side (Murray N. Rothbard, Ph.D. Professor Emeritus of Economics)
"Anarchism misunderstands the real nature of man. It would be practicable only in a world of angels and saints" - Ludwig von Mises