Google runs thousands of A/B tests...there is a good chance you've just never seen one. Regardless, there is published data about how people click on the top 3

Google runs thousands of A/B tests...there is a good chance you've just never seen one. Regardless, there is published data about how people click on the top 3 links the most, and click dropoff is precipitous after the second page. They simply don't need to do infinite scrolling...most people will requery the engine before checking the second or third page.