Based on your argument though, the sensible way to do it would be to offer asylum predicated on some kind of IQ test to ensure that we’re getting all the Caucher Bitkars our there and not wasting too many resources on lesser intellects.

Indeed, what would really make sense is for developed countries to be actively working to apply IQ tests to every third-world shanty town out there, and actively paying high-scoring individuals to immigrate.

In the real world this kind of thing is generally considered somehow to be in bad taste, so most developed countries go about it in a rather more roundabout way. Still, any country which actively started recruiting would find themselves with a huge advantage (at least when it comes to Fields Medals).

There are thousands of Einsteins or Thomas Edisons that were never born because someone had a headache that evening. Should countries be tripping over themselves to encourage more babies? Is there some reason that you think an asylum seeker is more likely to be a Fields Medal Winner then a regular citizen? What about the country these people come from do you think we should strip theses countries of their brain power? Do you support regime change wars if the powers that be give you a good story about wanting "freedom" for there people while taking action that will likely kill maybe a hundred thousand people?

Say a small city has about 50 new job opening per year at there current growth rate and already has about 100 people looking for work. Do you believe, because your intentions and character are good and you mean well that somehow a magic fairy is going to come down and create more jobs just because more people show up? Do believe in type of job theory where if the wealthy are allowed to keep wages low, because of competition, that we all will be better off in the long run because of some "trickle down theory of labor"?

Those people that show up will require goods and services. The economy will act to meet that demand if it is not restrained from doing so. So yes, in broad strokes, if more people show up, more work will need doing and more jobs will be created. No magic fairy required.

If the developed countries really want to attract more talents, there is better way to specifically targeted on those individuals. Asylum is not for this purpose.

I think Asylum is no the appropriate category for this. Instead create a "brain drain" visa specifically aimed at them.