Some things
are facts, like the density of steel or the list of historical US presidents. But other things
aren't facts, and where something isn't a fact but instead is implicit knowledge derived from a set of both data and assumptions (like a model or an algorithm) Google should absolutely not be taking that data and treating it as their own. Given the PDF includes this quote "
I decided to build a company that attempted to make educated guesses based on the sourcing of a full-time research team." I think we can assume that the data on CelebrityNetWorth wasn't "facts".
However, even if CelebrityNetWorth's data were facts, I don't believe Google should be able allowed to replicate the work that people have put in to building a website that lists facts. Google could, and eventually probably will, replace every fact based website with a sidebar in their results page. People can't compete with that. That's using Google's (de facto) search results monopoly to stop people searching the web. That's making the web worse. That's stifling innovation. I might be able to dream up some way of using CelebrityNetWorth data to improve the world (somehow...), and Google would be stopping that.
The engineers who work at Google need to stop ruining the web by trying to turn it in to their own walled garden.