An Engineer? I'm Dubious

According to an alleged engineer writing to The Corner:

Immigration is basically a plumbing problem - our border leaks. When you have plumbing that leaks, you fix the leak before you start cleaning up your house. Build a fence and stop the leak, then decide how to clean up.

Note that the leak is cause by a pressure differential across the souther border - lots of people want to come here. (Compare to northern border). Economic opportunity here far exceeds that in their own country, and there is little risk of associated with coming here illegally. So pressure builds to our south. Once the leak is stopped, we can look at ways to equalize the pressure. Strict enforcement and deportation would do it. Getting Mexico to reform would help as well. I'm also fine with increasing legal immigration through carefully regulated valves on our southern border.

Ironically, amnesty will only increase the pressure.

Yes, I am an engineer.

On the other hand, if a leak is fixed but the water isn't conducted away, it will recur. According to to former blog Trolling in Shallow Water (quoted here):

One phrase the inspector seemed to like was "water will win." Apparently this is an aphorism he picked up in the Army Corps of Engineers. What it means is that, unless you give water an easy route to somewhere harmless, it will make its own route by wearing through whatever is in the way. A roof is not kept in good condition by waterproofing alone; that will fail unless there are appropriate gutters and flashings to let the water run off the roof. Likewise, the rain gutters must give water a clear path to a point far from the foundation, or the crawl space will flood no matter how solid the foundation is. Water will win.

Also see here:

If you build in the path of moving water, sooner or later, water will win.