In the late 70s around 23% of US corporate revenues went to pay salaries. By 2012 that had fallen to 7% - in other words, just before neoliberalism really took off almost 1/4 of the money workers spent buying goods from US companies was almost directly back in workers’ pockets, whilst by 2012 less that 1/14 of what workers spent buying goods from US companies ended back in workers’ pockets.
All that excess money that doesn’t get recycled back to workers anymore has got to be pooling somewhere.