These bills/laws/what-have-you always seem to get "rushed" through. Something un-democratic happens on each and every one of them. UK's Digital Millenium act gets passed without debate in the last minutes of a session. France's Hadopi law gets mysteriously passed after being rejected. ACTA gets negotiated in secret.
That's the mechanics of the "why", thank you for that. Let me clarify:
Rushing or backdooring these things through has a cost, and a price. Both have to be higher than a normal legislative process, I believe. I guess I should say "what motivates people to rush or backdoor these things through at the higher cost?" rather than just say "Why?".
I believe that the National party in NZ believe that by implementing ACTA (that's essentially what this is) that they will curry favor in terms of a potential US free trade agreement. It's basically the US dictating intellectual property law to the world.
The reason to do it under urgency is that it's so incredibly flawed and unpopular, it probably wouldn't stand up to a normal democratic process. So by sidestepping the democratic process, it makes it much easier to get things done.
Why?