The allocations are almost certainly reduced based upon estimates of illegal immigration, are they not? So if illegal immigration were cut to nearly zero, we could let in a lot more legal aliens. How many people are in queue to enter legally? If we kicked out five million illegals and let in five million people from the queue, what effect would that have on the queue?
I don't think so. The legal and illegal immigration are handled separately, AFAIK. We get many legal immigrants from Mexico and other Latino nations. I believe they have among the highest quotas for legal immigration.