[unishark]

It is interesting to view as a kind of state machine though I don't know about treating it as a meme. Certainly a cold calculation. I've long thought that US immigration queues reflects the simple fact that from an individual perspective, if the average person wants to join a group far more than the group wants them to join, there will necessarily be a difficult hurdle to enter and a long line. I suppose this is pretty obvious, but an important fact of life. Also a different case of P(A->B)>>P(B->A). And highly-skilled students from India probably know better than we do how the high-tech pay rates in the US compare versus other places they might more-easily immigrate to.