Depends on your personal ethics.
If you find that pursuit of personal wealth (many refer to this as "pursuit of happiness") is the most important aspect, Wall Street is the better option.
If you find that pursuit of hegemony of your state (many refer to this as "patriotism") is the most important aspect, NSA is the better option.
And if you find that things like human rights actually mean something, you find both to be unacceptable options.
Unfortunate reality however is that all three aforementioned aspects are in fact idealistic. World is anything but, and we find ourselves balancing between different aspects of those things among many others to find our paths in life. As a result, I would not straight up make the claims as extreme as yours. They're far too hyperbolic. While many people working at wall street to end up as thieves, many do not start as such. Same goes for people working for NSA.
That is the other side of this coin. The less good people join these structures of power, the more power those who are corrupt gain within them.