That is easy to answer: when and if Google puts a big ADVERTISMENT label on top of all of their search results, then they can do whatever they like. Otherwise,

That is easy to answer: when and if Google puts a big ADVERTISMENT label on top of all of their search results, then they can do whatever they like. Otherwise, consumers should be protected against fraud. And pretending that you show what is most relevant while you indeed show what pays best, is IMHO fraud.