Inborn intelligence, and implications.

Right now, there's a taboo in our society on mentioning inborn differences of intelligence and how well it means an individual might lead their lives.  Between individuals, it's less of an issue, as differences between individuals is accepted as a fact of life.  Differences between races are more of a taboo, and even so much as admitting it in passing could get you fired, or your career destroyed.

What would happen if our society ever admitted that intelligence was one of the most reliable indicators of future performance?  What would it mean?

Would they start channeling more educational rescources toward the smart kids in order to raise overall human acheivement?  Or would they start channeling more rescources toward the less intelligent kids to even the playing field? Would they prevent dumber people from having kids, by only giving reproduction liscences to the smartest of people? 

And what kind of changes would have to happen to cause a scenario to come about?

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Of course, when people start thinking "Man, I'm smart enough to run this place.  Why the hell am I still cleaning toilets", you'll just end up with a bunch of dirty toilets.  Smart people don't stay in dead-end jobs for long.  You'll end up with a bunch of managers and noone to do the actual work.