They tried that in Greece. The leeches have no concern for their host country, and multiply at a rate that eventually puts them in charge.
But eventually the well is going to run dry and when that happens, no amount of rioting is going to produce a thing except for destruction. When that happens, they eventually turn on each other. Believe me, I'm no one to buy into Biblical prophecy at face value but with each passing day things are beginning to look like what John foretold in Revelations. Sure it's not a blood red moon, demon locusts, and world wide earthquakes but I'm starting to believe that we are now living though the Tribulations.