Accounting for inflation, all the gov't mandates on automakers to add safety items, and how many more features are packed on these trucks why would they stay the same price.
Compare a 2011 to a 2014 - they're not close in terms of build quality and features. Why would they be the same price, especially with inflation?
My 2009 decked out LTZ was a piece of junk (was a nice truck at the time) compared to my new 2014 truck...so we are sort of getting what we pay for. It didn't have 1/2 the features and only about 80% of the performance.