Science doesn't in the slightest depend on trust. It depends completely on the belief that you can demonstrate something for yourself.
The idea seems to be to use the next treaty talks to strike a grand bargain: Britain will be helpful to those states wishing to establish a fiscal union among themselves if, in exchange, we can amicably derogate from the aspects of the EU which we dislike.
The unfortunate thing about working for yourself is that you have the worst boss in the world. I work every day of the year except at Christmas, when I work a half day.