Is the exorbitant cost incurred from the treatment of the questioner's father in Canada considered a debt that is religiously obligatory for the questioner to pay, or is it waived for both him and his father due to the latter's inability to pay? And if the father is able to pay a small portion of the debt, is the remainder waived for the questioner? And is it permissible for the questioner to consider these costs as part of the taxes paid to the Canadian government, or is there another legitimate religious solution to this crisis?

If you pledged to the hospital to cover your father's treatment expenses, this is a debt upon you that you must pay unless you are released from it. However, if you did not undertake the financial expenses, then the costs are upon your father and are a debt upon him, and you are not obligated to pay them on his behalf except as a voluntary act. If you guaranteed his treatment costs to the hospital, then you are obligated to pay, and it is not permissible to resort to deception using the issue of taxes. It is obligatory to abide by covenants and agreements in their lands.