The more bizarre part is how the various federal agencies do not coordinate. For example, the "fear they will be unable to collect Social Security benefits they have paid into." This means these people are paying taxes to the IRS who collects SS money from them yet they are "not eligible" to work in the US. This is "impossible" but the tax man doesn't ask questions when people send him money.

I think if someone has paid, say, 20% of their total lifetime earnings, with a minimum of $50K over ten years, in taxes to the US government, and they have not committed any crime, they should be given citizenship. This gives the USG ten years to find anyone they'd rather not have in the country, and let them leave before they contribute more than their fair share to a country that rejects them.