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Piketty's chart itself suggests nothing about the gig economy. Nevertheless, the recent fragmentation of the labor market can be understood as a result of increasing wealth disparity.

The concentration of assets has put the main distribution system of wealth (companies and employment) under stress, resulting in a scarcity of available resources. When a system is attacked, it usually fragments to recreate a new stable structure. The boss-employee relationship was failing at providing stability, so people started to opt out and are now inventing new work models that can decrease imbalance and reverse extreme concentration.