This Is An Amazing Chart: "The Financialization of America... and Its Discontents"

I don't have close-to-hand the figures that lead up to the 1971 peak so can't tell you to what extent endpoint bias shapes the narrative. However...that is one persistent trend over the 44 years from the peak to the 2015 cutoff.
From Charles Hugh Smith via the Daily Reckoning:

Labor’s share of the national income is in freefall as a direct result of the optimization of financialization.

The Achilles Heel of our socio-economic system is the secular stagnation of earned income, i.e. wages and salaries. Stagnating wages undermine every aspect of our economy: consumption, credit, taxation and perhaps most importantly, the unspoken social contract that the benefits of productivity and increasing wealth will be distributed widely, if not fairly.

This chart shows that labor’s declining share of the national income is not a recent problem, but a 45-year trend: despite occasional counter-trend blips, labor (earnings from labor/ employment) has seen its share of the economy plummet regardless of the political or economic environment.

Given the gravity of the consequences of this trend, mainstream economists have been struggling to explain it, as a means of eventually reversing it.

The explanations include automation, globalization/offshoring, the high cost of housing, a decline of corporate competition (i.e. the dominance of cartels and quasi-monopolies), a failure of our educational complex to keep pace, stagnating gains in productivity, and so on.

Each of these dynamics may well exacerbate the trend, but they all dodge the dominant driver of wage stagnation and rise income-wealth inequality: our economy is optimized for financialization, not labor/earned income.

What does our economy is optimized for financialization mean?

It means that capital and profits flow to the scarcities created by asymmetric access to information, leverage and cheap credit — the engines of financialization.

Financialization funnels the economy’s rewards to those with access to opaque financial processes and information flows, cheap central bank credit and private banking leverage.

Together, these enable financiers and corporations to get the borrowed capital needed to acquire and consolidate the productive assets of the economy, and commoditize those productive assets, i.e. turn them into financial instruments that can be bought and sold on the global marketplace...MORE.

HT: ZeroHedge