http://www.youtube.com/watch?v=E0AzCIzDf6I&feature=related
Wikipedia article about that guy:
http://en.wikipedia.org/wiki/Michio_KakuThis guy doesn't look like a complete idiot, but he is a theoretical scientist. I'm not saying he's completely wrong, but he seems to focus in areas of science that aren't as 'proven' yet (string theory). He might be on to something, but I don't think he's representative of scientists at large.
What you're saying about scientists being paid to lie sounds exactly like the accusations that Nasa is lying about a planet 'nibiru.' You can't just cover something up like that, there are scientists all around the world. As far as I know, most scientists do not support the 2012 doomsday scenario, if you think so, then that's because you're getting your news from the wrong place.
It's no secret that (at least in the US) major news networks contain a few elements of mass public manipulation. No we aren't being completely brainwashed or anything, and it might not even be a big deal, but there are still small elements of it there.