Constituent Service and Standing

If I understand correctly, I can't sue the NSA for intercepting e-mails or recording international phone calls, because I can't show that I have been harmed, and, therefore, I don't have standing to sue. However, I can write to my senior senator (that would be Kennedy) and ask him to demand that the NSA say whether any of my e-mail was intercepted. I don't need standing to ask my Senator for a favor. If I ask, they can't claim they are protecting my privacy by refusing to answer (failing the laugh test aside). Thus, it seems, if a majority of the Senate judiciary committee wants to give some people standing to sue, they can. Sounds simple to me. What am I missing ?