So if we grant amnesty now, aren't we just going to face the same problem again in another 20 years?

I think the argument for amnesty is a good one however what do we do in say 20 years when we are having this exact same discussion? Lets say we grant amnesty to the 12 million here with the usual bells and whistles about tighten border security, stabilizing the latin american economy, yadda yadda (you know the conversation we had in 1986?) then low and behold in 2030 what do you know, we have 20 million illegals in the country living in the shadows yet again. Any American who says "send them back" will again be deemed racist and hating brown people...you get my drift? Illegal immigration is a systemic problem that is never going to go away. Do the proponents of amnesty simply want the US to have an open border?