Here's an example of how lack of copyright can foster innovation and it's for the greater good of the society to not restrict access to "designs", or charge a lot of money to license them.

http://www.ted.com/talks/johanna_blakley_lessons_from_fashio...

EDIT: I found this one, too:

http://www.ted.com/talks/larry_lessig_says_the_law_is_strang...