There's some evidence that high inequality precedes instability (Piketty good starting point, follow his references & data). The mechanisms are somewhat nebulo

There's some evidence that high inequality precedes instability (Piketty good starting point, follow his references & data). The mechanisms are somewhat nebulous and likely complex and diffuse. So no single WHY other than stability (I live in the UK and an unpredictable future is really bad for my business as we just found out).