> My understanding is that the legal link was created by the Emergencies Act. The government believes that it will be able to calm the situation faster if they can track and cut off the flow of money.
They created a power of themselves, out of expedience, but there still doesn't seem to be any justification or grounds for it according to the basic principles of the Canadian legal order, except it formally comes from the PM, and he has cops.
They created a false legal reality (grave danger of violence to Canada and its people), which isn't objectively observable, to justify a power to solve that false reality, where in fact they are using it for something else (forcing people to move parked trucks).
They could have just arrested all the truckers for a variety of traffic laws or public-order laws (honking, noise), and then moved the trucks one by one. Instead, Emergency powers...
As my administrative and fiscal law professor taught us, after listing for two weeks all the principles which can be used to craft a law (not Canadian law school, European) :
There's one very old legal principle left, according to which laws are sometimes made, wrongly, but well, that's the real world for you : "I'mma the state, I do it because I can, or I'mma gonna crush you".