And no, fraud does not account for most of Google's income. Google is a public company and you are more than welcome to review those figures yourself.
Fraud: saying from every top of the mountain that we serve results best for the users, we serve unbiased results, you can't buy a top rank on Google etc etc etc and then showing barely distinguishable (from content) ads on top and in many case showing almost all ads. That's fraud to me, regardless of the fact that we have a toothless FTC.
What % of users know a Google ad vs unbiased content? What % of users know that Google Products is 100% ads and in many cases it cost them a fortune?
If Google wanted users to know ads or bought rank from unbiased ones they'd find the way. They can just undo what they did from around 2007 until now.