I always thought keynes gets a bad wrap because he didnt understand or atleast didnt explain that for his ideas to work the politicians need to be reasonably sure they will be voted out if their deficit spending isnt atleast mostly positive roi stuff or very short duration negative roi stuff, which isnt true unless all voters have real losses when politicians run deficits or decades of negative roi stuff has left a majority of voters sure things cant get better or atleast keep them insulated from the bad down that path.