The borrowing authority is the maximum amount the Minister of Finance can borrow to finance government operations. It doesn't necessarily go together with the spending authority. The spending authority itself is granted through separate bills, and can be such legislative statutory authorities as employment insurance or old age security, which are permanent programs on which Parliament does not need to vote every year. There are also operating expenditures, grants and subsidies and so on, for which Parliament has to grant authority to spend on an annual basis. That's done through main estimates and various supplementary estimates.
Even though the borrowing authority can be increased, it does not grant authority for the government to spend. They have to seek spending through separate bills.