>The gap between productivity and wages is striking, isn't it?

It's not. The (in)famous epi.org is flawed for all sorts of reasons, from excluding noproduction/supervisory workers (the highest compensated ones!), to excluding non-wage compensation (eg. benefits), to different deflators for compensation vs productivity. If you adjust for all of that, the chart is unremarkable.

https://www.piie.com/blogs/realtime-economic-issues-watch/gr...

That incidentally, is the exact problem with the site. It presents a barrage of charts, without regard to relevance or rigor, and tries to persuade through sheer volume alone. Yet, if you scrutinize any of them, it quickly falls apart. That's probably why the site doesn't even bother justifying the charts, or even state the thesis, for that matter.

This smells like the think-tank "CEO comp justifies worker underpayment" and "health care inflation is wages" arguments, I'll look into your source but I can't pretend to have high hopes.

As for "gish gallop," right back atcha: those billionaire-funded think tanks firehose a lot of nonsense into the economic discourse (and curricula!)