Actually the British did write a constitution for Canada in 1867. It gave the British Parliament and/or the King/Queen a veto over Canadian affairs, but was not implemented. In 1982, the constitution was taken out of the hands of the British Parliament and put into the hands of the Canadian Parliament and provinces. I was not very political at that time, so I did not understand the significance. There have been a few amendments to that 1982 document (by Parliament and provinces) and the higher courts have referred to the document to help decide cases. But legally speaking, Canada is still a constitutional monarchy as the Queen’s representative has a veto over Parliament.
I don’t believe in a deep state, but if there was one, it should be overjoyed at its ability to inculcate a sense of powerlessness in its citizens.
I have categorized political reformers into five basic groups. I have written a Medium article to this effect: