Songs With Deep Meaning?

It looks like you really need to branch out and check out music that originated before 1990. You want deep songs? Try Pink Floyd, Led Zeppelin, Steely Dan. Honestly, I know these are probably considered 'old-school', but there is a reason these bands are considered clic. Trust me, twenty years from now, Cory Taylor and Kelly Clarkson will be forgotten footnotes; but everyone will still know about Pink Floyd.