But one potential contributing factor comes from a fascinating piece in National Affairs by Marc Dunkelman, who fears the winnowing out of so-called "middle-tier relationships" for the American citizen.
Without these vibrant, heterogeneous "middle-tier" relationships, Dunkelman argues, it may simply be much harder to build the sense of public trust and unity that allows people to stand up to big challenges together.
During the demonstration of RAD for the Server, Dave Mendlen, Visual Studio product planner, built what he called a "middle-tier business object" for a wine-selling Web site using six lines of code, an operation that he said would take "hundreds of lines of code" with the current version of Visual Basic 6.
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In its School Organisation Review, Suffolk County Council is replacing the three-tier system of primary, middle and secondary schools with the two-tier system which cuts out the 40 middle schools.
The menswear maker, which produces garments for Tommy Hilfiger and Polo, expanded its profit by 56% in 2012 by improving its own high-end Black Label brand, which appeals to the growing ranks of middle-class men in second-tier cities.
Universal coverage is never as universal as its proponents want it to be, and it usually results in a double- or triple-tier system as the upper-middle classes flee.
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"If only because of rent, it is hard to save a lot of money in top-tier cities for the middle class, " said Jeff Walters, a partner at Boston Consulting.
Below them stands a second tier of half-a-dozen middle-sized banks, some of which are being stalked by foreigners.
Population flows aren't so cyclical, and public works nearly always follow. (And these, too, need refurbishment.) James Kitzmiller, chief executive of the aggregates side, loves what he calls the fishhook--lower-tier states from California to the Carolinas, and up through an industrial middle by way of Kentucky.
Four more middle schools in Suffolk are to close after the county council backed plans to continue a move towards a two-tier education system.
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