Having watched YouTube videos of the Egyptian Armed Forces Symphonic Band mangling various national anthems, I would certainly debate its long term effects.
Seriously though. Those videos made me wonder, how much is corruption at play there, and in this question as well? Were they really all that concerned about the cultural decay of the nation, or was it maybe about an opportunity for bribes? If garage musicians really made a lot of money from audio cassettes, wouldn't some have seen that as an untapped opportunity to extract bribes?