An interesting little exercise in budget analysis:
There are just under 5600 humanities professors at Canadian universities, and 7600 in the social sciences (excluding law, which is another 600 or so). On average, these people make about $108,000/year (slightly higher in social sciences, slightly lower in humanities). Add another 25% on that for payroll taxes, health, and pension, and the direct costs of employing these folks is about $135,000 per year. That comes out to about $1.85 billion in total.