It might not be only an artefact of unsound money.
One little-known fact about many of the large public sector pension funds is that during the 90s tech boom, some insane state legislatures wrote into a law a mandate for the managers to obtain 8% annual returns.
Anybody with more than 3 brain cells can easily see that this is impossible to sustain for more than a handful of years. If the economy grows at 3% per year and your portfolio grows at 8% per year, you can calculate the year at which your portfolio would be greater than 100% of the economy.
How much influence as a shareholder does CALPERS, for example, have on publicly traded companies in the US?
I remember hearing story after story about profitable tech companies in the US being effectively strip mined (stop all R&D, full power to marketing, offshore to China) in the early to mid 2000s.
Everybody said it was because CEOs only cared about the next quarterly report, but no one ever speculated as to why this had suddenly become the case.
Large public sector pension funds with their legally-mandated, yet mathematically-impossible, desire for yield would appear to be a huge smoking gun that should be investigated but I've never heard of anyone looking under that rock and reporting back what they found.