I see this thrown up regularly and often the poster implies that everyone knows why wage growth separated from economic growth. You've alluded to monetary polic

I see this thrown up regularly and often the poster implies that everyone knows why wage growth separated from economic growth. You've alluded to monetary policy, so in this case I guess inflation. It's a lot more complicated than that. Up until the 1970s unions were incredibly powerful and this was coupled with labour friendly "full-employment" policies. People still argue over exactly what triggered the inflation, but it's clear (at least in my reading) that this was a rare period were labour held sufficient negotiations power to claim it's share of productivity growth. What follows is known as the revolt of capital, where for many reasons, including the inflation, it became impossible for return on capital to keep up with the printing press. Then begins a continuing period of dismantling of labor's power through union busting, policy, and globalization. Fundamentally, labour lost it's negotiating power, and hence it's claim to wage growth. Inflation was merely a driver of change.