Israel has no need for cheap unskilled labor from the Palestinians. There are already more than enough Thais and Romanians, and, well gosh, ISRAELIS to do that kind of work. It's the Palestinians who want it both ways--they want to continue blowing up Israeli civilians wherever, and they want unimpeded access to Israeli jobs, medical care, etc.
Let me know when you've had your reality check. Israel has one of the lowest birthrates in the world, and as a result they must import not only unskilled laborers but many skilled workers, too.
Remember, the Palestinian who blew himself up in the hotel last weekend and killed all those people at the Passover celebration was a former employee of the hotel. Companies in Israel would never hire Palestinian workers unless they really needed them.
And think of all those stories you hear about terrorists attacking soldiers at "Israeli checkpoints." The soldiers aren't there to keep Palestinians out of Israel -- they're there to make sure the Palestinians entering Israel have valid working papers.