Yeah, I would bet $$$ that the reason they don't sell raw PCM or FLAC is simply because that would allow anyone to make "perfect CD copies" of the material
Though your right, the Physical CD is all but gone the way of the record and cassette tape. Soon there wil be NO WAY to get a quality copy of the material at all... We'll probably be stuck in a quaoity hole for several years before they fully embrace digital distribution, then maybe we'll actually start getting some 24bit/96Khz, FLAC or a tleast super HQ MP4a files for sale.
Heck it might be cool if they say charged 50 cents for an mp3 and 1.50 for a super HQ mp4a of the same material! Man there are so many things they COULD do to make music buying more attractive and lower piracy if they would just go whole hog on embracing the "future". We ARE in the 21st century now!