There are other budgets for training in the public service. Each department has an envelope for employee training. It falls under operating expenses, personnel expenses or the purchase of goods and services. They buy training from other suppliers.
The School of Public Service also operates in part on a cost recovery basis. That may explain why its budget doesn't seem to be going up. It sells its courses and services to departments and agencies, including my own office. Our employees have access to some of the courses offered by the School of Public Service.