Comparing corporate profits to GDP doesn’t make much sense. The BEA corporate profits number includes profits earned overseas, which aren’t included GDP. Corporate profits divided by GDP could go up without anything changing in the economic relationship between workers and corporations with respect to work done in the US.
Also: https://wolfstreet.com/2015/11/04/corporate-profits-are-the-... Under "This is a new America" you can watch corporate profits grow and grow.
But both your source and my source are 5 years old already. A lot has changed since then.