I don't think Greenwald misses that point, he (like anyone who understands the scope of spying at play) clearly understands the implications of massive spying a

I don't think Greenwald misses that point, he (like anyone who understands the scope of spying at play) clearly understands the implications of massive spying and how that could play into blackmailing our other branches of government. The point of the article is pointing and laughing at people who cant make the logical leap of, "if they do it to someone else, they might do it to me.", the political uses are just the MOST obvious thing to do in this scenario.