Have gains by the rich come at the expense of a declining living standard for the middle class?
Median family income in America between 1980 and 2004 grew by 17 percent. The middle class (defined as those between the 40th and the 60th percentiles of income) isnt falling behind or disappearing. It is getting richer.
The lower income bound for the middle class has risen by about $12,000 (after inflation) since 1967. The upper income bound for the middle class is now roughly $68,000some $23,000 higher than in 1967. Thus, a family in the 60th percentile has 50 percent more buying power than 30 years ago.
To paraphrase John F. Kennedy, way back in 63', this has been a rising tide expansion, with most (though not all) boats lifted.
We've had a bit of a glitch these last few years but not that much worse than in the late 70's-early 80's.
What this glitch has done is to show that the Governments at all levels are bloated in size by their over use of OUR MONEY.
Getting richer is an interesting concept, you base it only on uncited information about income, and I cant even figure out if the percentiles you mention are stay in medians or migrate to averages, or how inflation was calculated into the figures. I do suspect you're comparing apples and oranges.
Also an income bound is an arbitrary divider and carries no weight in and of itself.
The middle class is not thriving, we are having our bones picked dry by the high cost of insurance, the decline in the value of homes, flat wages, declining jobs market, high cost of education for our children with a potential that they may not be able to find employment, high taxes, and a system that finds the interests of the rich to be far more important than preserving the economic base of middle class families. In addition the decisions made by our gov and our business interests seem suicidal for our system as a whole. You simply can't allow everything to be done elsewhere because it is cheaper over there and maintain a viable economy.