What they should do is to create an EU CA and all countries to have subordinate CAs. Then you only have to have one CA added to the browser list that ca be added/removed at will or only added when interacting with the government and then removed from the browser.

For non-tech people I am pretty sure someone could write a program that does this automatically - like two buttons, one saying you need to access the government and another that says you don't want to access the government anymore.