Isn't the Shin Beth even more dangerous. The Mossad, at least when operating in foreign countries, may risk persecution by local police like it was the case with Uri Brodsky after the Dubai assassination. In contrast to this, I had the impression that it's even more difficult to control the Shin Beth, regardless of the fact that its activity seems to be regionally restricted.
Magnitude 4.2 quake strikes near Grand Coulee Dam in Washington (Reuters)
from the article: Watching the watchers: Who monitors the Mossad?