If you feel they are purposely manipulating the results give some good examples to back up your assertions. What you are saying is that millions of webmasters around the world are actually wasting their time with SEO.
If this would be true then only the big sites will get the best SERP, no competition anymore. Webmasters of portals would not get any good results from SE’s anymore and would become redundant if the casinos could buy the traffic.