Excellent idea.
"Unfortunately deporting does not work because most of them reenter our country illegally. Give them long prison sentences and deduct the cost of incarceration from aid we give to the illegal's country of origin."
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There is a problem with even that - a big one. See #77.
Our court system is at critical mass and ready to explode with the increased pressure of the illegal alien case load. Our prisons are bloated and we can't build them fast enough. We already have more people incarcerated than any other nation in the world - including Communist China (who has more than a billion people).
We're in trouble.