It is the good fortune of the affluent country that the opportunity cost of economic discussion is low and hence it can afford all kinds.
Ideas may be superior to vested interest. They are also very often the children of vested interest.
The stock market is but a mirror which provides an image of the underlying or fundamental economic situation. Cause and effect run from the economy to the stock market, never the reverse. In 1929 the economy was headed for trouble. Eventually that trouble was violently reflected in Wall Street.
Liberalism is, I think, resurgent. One reason is that more and more people are so painfully aware of the alternative.
It has been the acknowledged right of every Marxist scholar to read into Marx the particular meaning that he himself prefers and to treat all others with indignation.