> The real question you might want to ask is what if these drugs become expensive and only the upper class can afford them. It might lead to a sort of catch 22

> The real question you might want to ask is what if these drugs become expensive and only the upper class can afford them. It might lead to a sort of catch 22 by which no one was interested in hiring less intelligent or less capable people who couldn't afford such drugs. Unless government regulations get in the way, I would expect employers to start paying for their employees' drugs. If they don't produce enough of an effect for that to be worthwhile, I wouldn't expect them to see widespread use. (If they cost $X,000/year but only increase your earning potential by $Y,000/year, with Y<X, how many people are really going to take them? Not zero, but I'd guess not enough to have much impact on the market. And if Y>X, it's a good deal for employers, who might also be able to use economies of scale to get the drugs at a discount.)