What pension plan invests in QQQ specifically?

And "pension" in the US usually implies defined-benefits, meaning you don't actually care what it invests in. If you're talking about defined-contribution retirement plans like 401k, you are very unlikely to be invested in QQQ without consciously making that decision on your own.

Honestly, they're probably subsidizing Elon already via Tesla, but the super disturbing part here is what the author nails when he says the tail is wagging the dog. Indices should reflect market investment, they shouldn't drive it like this.