The result is that governments have used urgency as a way to pass major and controversial laws without full consultation or debate. Examples include 'three strikes' (http://boingboing.net/2011/04/15/new-zealands-3-strik.html), the 'Hobbit Act' (http://www.3news.co.nz/Hobbit-bill-becomes-law/tabid/419/art...) and the GCSB (spy) bill (http://parliamenttoday.co.nz/2013/05/house-goes-into-urgency...). Whether you agree or disagree on the merits of the bills, I do think it's fair to say that all deserved more debate and consultation than they got.
And I'd argue that all of these examples were driven by lobbying (from the media industry, the Hobbit producers and the espionage agencies). Our process of making laws is generally healthy and open, but it does have dangerous blind spots.