I don't know about that. The person who flies once or twice a year probably don't care that much and appreciate the security theatre- all part of the drama of flying. Definitely those that never fly would support unlimited security restriction - like those who don't work support higher taxes.
I recently was at a conference, and was pulling my old laptop from my bag. I joked to some people standing around that I use my old laptop in case the TSA decide they like it more than I do. One person looked at me seriously and said 'why would they do that'. I responded with 'well, it's not like anything they do makes any sense at all'. Most people laughed at my joke but that one person looked offended.
I'm guessing that person was the visible representative of a population who thinks the TSA is doing important work and actually improving things.
I don't know what the answer is. Everyone is painted into a corner by this : any politician that mentions disbanding the TSA is going to be slammed by opponents for being soft on terrorism. Soon enough the TSA employees will have a srong union and lobby against any changes and actually ask for more. The only way around would be an eventual change in technology that busts the old paradigm apart - like a new way of getting onto planes, or a whole new transport system. If you look at shipping, there are practices and laws which date back 400 years. I don't think all this cruft being attached to air travel is ever going away. Maybe with another big war when there is not enough resources or something. 'TSA abandoned for war effort' - that type of thing.