Industrial capacity utilization has been shrinking since the early 1970s. In the early 1970s, 88% of invested capital was utilized in production. Today that's less than 76%. So about a quarter of invested capital is sitting idle currently. ( https://fraser.stlouisfed.org/scribd/?toc_id=296052&filepath... ) ( https://www.federalreserve.gov/releases/g17/revisions/Curren... )
Also in the US we've seen since the 1960s increasing debt percentage across households, corporations and governments, lower wages against different backdrops, and decreased capital re-investment as a percentage of GDP.