So how does that differ from a chinese worker or a robot taking jobs? Trying to hold back technology because of the fear of what it may do is self defeating in the long and probably short run. Currently, education, connections, money all contribute to an unfair job market anyway. Those that are in "secure" positions don't want to rock the boat, yadda, yadda yadda.
The truth is that eventually something will give and we'll see things work out for the betterment of everyone and not just a few. For those that are interested in pursuing a sharper mind, more productivity, more insight, I say go for it. Like another poster said, we don't know where our next invention is coming from and personally I'm all for clearing the way for innovation which includes helping those that innovate any way possible.
I don't really think these drugs will help those that don't put the time forth to become better by training their minds to learn. I think the good ol' boy network will do it's best to keep these folks down, but eventually someone will recognize those that take their brains seriously and hire them. Look at Google and it's PhD program. Too many times in computer science those that have a master's degree are more highly sought than those with PhD's. It's like folks don't recognize the effort behind going the extra yard, or for some reason don't want it. Inferiority complex? I don't know but Google seems to have done well so far valuing those that value their minds/education. Once people see an effect they will all probably jump on the drug bandwagon, but they won't have the mental skills that it takes so the checkbox for doing drugs will be as meaningless as it is now.