Israeli and US intelligence are very close, and I suspect there are strategic benefits to being the supplier of these technologies that incentivize it. Also, they both have interest in questionable internal security agencies (eg saudi's, Iraq's & Egypt's) succeeding, to avoid isis-like groups getting strong.
I'm not excusing it (I'm Israeli btw), but the whole approach to military industry is built on treating suppliers as not responsible for how their products/weapons are used. That said, intelligence tech feels more like outright mercenary services than weapons sales. This might get marginally better as the scandals mount.
Best case, non-radical scenario: any SigInt technology is treated as "strategic," with close oversight.. like anti-aircraft somesuch.