Just to clarify, I am NOT referring to the garbage eating carrier of Xenopsylla cheopis, and hence Yersinia pestis (among other diseases and disease vectors), I am referring to the use of informants to aid law informants.
You can call them whistle blowers, informants, snitches, finks, narks, tipsters, stool pigeons, or RATS.
One point that has consistently been made with regard to immigration is that it is the willingness of employers to hire illegal aliens that drives this migration, and whatever disagreements there are on Kos, I think that we all agree on this.
The problem is that there is neither the political will, nor the resources allocated to finding employers who underpay illegals, and generally violate a whole host of other laws regarding pay and safety.
As a solution, I propose a "rat clause" in the immigration bill, specifically that any illegal who rats out an employer who is hiring illegals be given a green card.
I'm not sure of the details, like whether the green card should be permanent or temporary, but this would make enforcement against employers effective and inexpensive.