The amount of $1.73 is what the employees must pay, and the plan is that this will also be the rate paid by self-employed workers.
Currently this amount is set by the government and we know that it will not be sufficient to pay all of the costs. It will probably change, because the new crown corporation will be determining the rates needed to finance the employment insurance program in future.
For the moment, we consider that this $1.73 premium pays for everything.