There is an interesting problem with modern journalists: Someone has to pay them. In this case the journalist interviewing Greenwald is paid by the government. In most cases when not paid by the government, it is the big media conglomerates that pay the salaries.There is a saying:
"He who pays the piper calls the tune."
One reason I do not watch most news programs is this issue. I applaud those like Greenwald who bring us information that the "powers that be" do not want us to have.