I don't think we are talking about the same thing. This is a matter of people's perception of their ability to affect change in the government today. Anecdotal, I know, but most people I've talked to over the years believe that nothing they say or do will matter because it's in the hands of people with more money and power than they have; people that have no interest in what they need or want.
Again, it's a matter of perception and I don't think that perception is necessarily true.
One of the only ways for a person to make a difference is to run for office themselves which isn't practical for a lot of people. Other than that who is going to care what you have to say? The government is so big and so full of 'power people' that one little person from nowhere'sville isn't going to do much.
With the information age and the internet you can get your voice heard by a lot of people, even the president. Your opinion is not stifled. That may not matter though because the person pulling the strings to actually do something is vastly more powerful and rich than you. So while you can have your say it doesn't mean anything.
You do need money and power to achieve anything today. Look who they give credence to when it comes to political opinion tv, movie and music stars. They're some of the most ignorant when it comes to politics.
However, every now and then someone manages to break through and, as an individual with limited standing, can make a difference like Martin Luther King. Its rare though, especially in this day and age.
I think a lot of the power the average citizen has is in the mob. By yourself you're nothing, but if you can get a mob together you'll be heard.