"Israel values its security, and pays for it. According to an analysis by Bloomberg News, Israel spends around 10 times more per passenger than the United States does."
A little more on that:
"[An analyst] estimated El Al's security bill at $100 million a year, which amounts to $76.92 per trip by its 1.3 million passengers. Half is paid by the Israeli government," Peter Robison wrote. The United States, in comparison, spent in 2008 $5.74 billion to monitor and protect 735,297,000 enplanements, or around $7.80 a passenger."
The TSA system is a production line - hire cheap unskilled labor, and train around a process and manuals.
In the USA the Israeli version would be very difficult in addition to very costly.
That doesn't even take into account the question of the uproar the system would cause with the suggestion of racial profiling.
References via:
http://www.bloomberg.com/apps/news?pid=newsarchive&sid=a...
and
http://blog.foreignpolicy.com/posts/2010/01/07/would_you_pay...