It Was Weiser That Undermined The Austrian Neoclassical Heritage.

It seems to me from what I have read that the neoclassical heritage of the Austrian School was hijacked after Bohm-Bawerk's death and the elevation of Weiser to the position of 'spokesperson' for Mengerian economics. He was clearly a positivist.

There are always points in time where events turn. What could possibly have happened in the 1930's that was more significant than the hijacking by Weiser after 1914?