Not only are economists not mystified by this chart, the explanation is so simple even Noah Smith can understand it.https://twitter.com/business/status/1157757803139915780 …
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Mmm... also can't be outsourced easily.
Reading up on Baumol's, the wiki presentation assumes that workers would receive higher wages from increasing productivity.
Also, labor has continuously increased in price since the 1800s. The modern history of ornamentation in art and design is (I claim) a direct reflection of the cost of artistic labor. "In this Modern age we are streamlined and don't pay for frou-frou."
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