[Lizavetta]

I believe BOTH PARTIES allowing unchecked illegal immigration to continue is happening because they hope all those extra taxpaying bodies will keep SS afloat for a little longer.

Am I wrong?

[OESY]

I think you are absolutely correct that it is one of the factors. Many of the European countries with aging or declining populations rely on immigration also to sustain their welfare state benefits.

Other factors might be the political downside with civil rights groups and growing immigrant groups (not yet neutralized by the activism of anti-illegal immigration groups), the harm that it would do to our economy to remove workers who in some cases pay taxes (though most would concede a net expenditure) and, finally, the difficulty of actually stopping the inflow, rounding them up, and deporting them; that is, unless we build an impenetrable barrier like Israel's wall which would be rather expensive, even if effective, since offshore islands, ports, the Canadian border, and various forms of transportation into the country are also porous.