Well... When torrerist attack happen, you guys would question government ability to gather information and blame on government.
I support government have ability to monitor internet and communication activities so they can prevent next torrerist. The last thing I would worry is state reading all my emails. How likely is that. No government has reseouce reading billions text message everyday. But when government do need read potential torrerist email or text message, then government should have the ability to do so.
Lefties alawys want put things to the extreme. If you want hide something, you are doing something that need to be hide.
There are a few issues here though. First of all, the government you know and love today might not be the same in the future. If power goes into the wrong hands, they could possibly abuse powers in their advantage. Having full access to all your citizen's communication could potentially open up for some really nasty manipulation.
But that's stretching it. The biggest problem is that non-encrypted traffic is not only not encrypted for the government, it's also non-encrypted for everyone else. With today's advances in technology "the bad guys" are always around and could easily sniff your information. So when your girlfriend suddenly decides to send your ID, credit card number, password or whatnot using a service without encryption its easily sniffed by someone who don't want.
I don't care if my government has access to this information. The problem arises when various third-parties that are up to no good get access to said information. And without encryption all the information is basically up for grabs for anyone interested in spending a few calories on gaining access to said information. With basically EVERYTHING going digital, you can't keep relying on non-encrypted services unless you want to get into some serious trouble down the line.
And the argument about terrorism has to be the stupidest of them all. By going all non-encrypted you are making it way easier for the terrorist to gain access to all kinds of everyday, private information that will give them a much easier time to do whatever they want.
EDIT:
Even with encryption we have big companies and server being infiltrated and hacked left and right. Usernames, passwords, e-mails, ID's, credit card information and what not are bleeding left and right do to poor security and encryption as is. Bad people go miles and beyond to hack various servers to gain access to various kinds of information, what happens when you start eliminating end-to-end encryption making sure that all kinds of information is that much easier to access even before it reaches said servers? You are basically handling over all information to whomever have the motivation to gain access to it. That's not a good thing.