Can you explain how this works? What do you mean you pay 4% towards your vacation? Like the employee contributes 4% of each paycheck to some sort of escrow account?
In practice this just means that you can take two weeks and still get paid. You can forgo your vacation in some instances, but you still get paid out the vacation money. I used to do that when I worked part-time in college and was short of cash for whatever reason.
Ontario's rules - https://www.ontario.ca/document/your-guide-employment-standa...