Ok, First of all, I feel like "around the world" is stretching it a bit much for the purposes of the article. Secondly, I don't think you can explain the core reasons for this without talking about a specific country, because despite the similarities of even, say, the US and the U.K., the underlying causalities are much different. Thirdly, it is ominous when the author talks about the media consuming educated group, because the main thing being ignored in that front is the fact that operation mockingbird never went away and (the US at least) has turned propaganda into an invasive art. People are dangerous when they are easily propagandized, but especially moreso when they don't even realize it. Of course that's why in politics the 50-80 year olds are the primary target. Because they vote and they consume the bullshit off $TVStation with little incredulity. This is also why the Internet is under increasing threat from the supranational oligarchy, because the anarchistic freedom of thought it encourages is dangerous to them.
I could tell you about where this trend is going, but that would involve conspiracy theory and nasty confrontation of facts that most people don't want to do to be honest. As for why "the people" are trusting "the government" less, I think while much of it is the natural reaction to a government with corruption run amok, I have a sneaking suspicion that at least some of the increased distrust for government is a deliberate play by the supranational oligarchy vying to undermine the only thing that truly has any reigns around its neck, and that's government.
The other main factor is the lack of the rule of law. I think the lack of it has always been there, with varying degrees by subject of course, but now people find out about the true extent of the corruption and lack of rule of law via the Internet and I think it's breeding revolutionary attitudes.
When everyone sees stuff like bankers do obviously illegal, immoral, and amoral stuff, then get paid for it, and then get no legal repercussions, the rest of us are slowly gonna start saying "fuck it", and abandoning faith in institutions.