So Francis Walsingham, SOE, MI5/6 managed to keep UK safe without massive, intrusive intelligence gathering, even though they faced actual, serious enemies of the crown, but GCHQ can do it's job without spying on everyone when the biggest threats to UK are political (and seemingly unlikely to happen, like Scottish independence or humane EU) or economic (neo-liberals running IMF, ECB and Eurogroup).
Besides, to defend yourself, you don't need that much secret information, you can get most intelligence about attitudes and aspirations trough normal channels. It's when you're about to do aggressive, undemocratic or clandestine stuff yourself, like build an empire, when you need secret and actionable information to impose your will on other people.
There's nothing more moral or good business about razor thin margins.
Nope, but they mean that the "free markets" work... anything other than razor thin margins signal that there's a disturbance in the market -- either actors don't have all the information they need, or something is preventing competition -- that allows for profit to emrge. Which is one way to say that good business is all about preventing the free markets from working!
Many times, these denier sites all quote one study, and in the cacophony confusion arises.
I would like to add that often these sites quote a study that does not say what the site claims it says, usuallly the contrary. So always check out the study, too. If you don't know the lingo, or can follow the science, there's usually some discussion to be found handling the misquoting of the paper.
As there very seldom is "conclusive" studies in anything -- and especially so in a cross-discipline field covering physics, astronomy and biology -- you'd be better off starting with Spencer Wearth's Discovery of Global Warming, me thinks.
Neckties strangle clear thinking. -- Lin Yutang