And my point is that there are probably a lot of those motivated people working on the problem today. You make it out as though we've arrived at this state by either lack of effort or competence by Google/Microsoft. My guess is that every time they change the algorithm, the spammers adapt too. That's inevitable and would be just as much of a challenge for your supposed utopia. If you have some secret they don't, there's certainly plenty of money to be made.