Comment: I picture a cartoon where two cities each buy a ticket for a half a dozen homeless people to leave their town. The Portland bus leaves that city with 6 less transients.  Everybody shouts, Huray! Huray! They're gone, now we have that many less homeless people!

Then a bus leaves from Eugene with a half-dozen  transients headed for Portland, and everyone shouts, Huray! Huray! They're gone, now we have that many less homeless people!

But suddenly, the bus from Portland arrives in Eugene with 6 Portland homeless,  and the other bus arrives in Portland, and drops off 6 Eugene homeless guys, and the folks in both cities smack themselves in the head--and they're all like-Oh sh*t! Nooooo!