"It has indulged...a narcissistic avant-garde speaking in languages that repel the average committed listener..."
Bernard Holland pithily dissects the two basic sets of problems facing American orchestras, in a very perceptive article from 2003:
The free-enterprise system, which worked so admirably to bring the American city its new wealth, transferred poorly to the performing arts. [...] With good management, it is supposed, money and listeners will come rolling in -- again, a symptom masquerading as a cause. Orchestras are not sick because they have bad management. They have bad management because they are sick. Failing industries do not attract top employees.
[...] As for disappearing audiences, no amount of managing will solve that one. Classical music has only itself to blame. It has indulged the creation of a narcissistic avant-garde speaking in languages that repel the average committed listener in even our most sophisticated American cities.
[...] Fleeing audiences are one more symptom, the cause being a public art that has been abandoned by its avant-garde and uses up its given natural resources with profligacy. Audiences are not to blame. They are smarter than Elliott Carter and Milton Babbitt want to think they are.
Definitely worth a read and some reflection....