I prepare 1,000 personal tax returns per year and I also live in Toronto.
I can tell you with certainty that gas, hydro and water bills in this city average out to $4,000/year depending on how energy conscious you are.
I also spend $4,000 a year for my home phone, cell phone, home internet and television.
So I am at $8,000 for my utlities and that includes some extras on my TV service (HD channels, MLB package) as well as cell phone that is used primarily for business purposes.
I agree with the OP's. Yours is a lifestyle question.
Many many people support a family on much smaller incomes than yours. I saw a few of them in my office yesterday and trust me, given the number of tax returns that I see, I know what's going on out there.
You are experiencing what most of us experience. We live to and sometimes a little beyond our means. It's like the old saying, "Nature fills a vacuum". It's just that your vacuum is bigger than most folks.
You probably have two cars, nice furniture, a big house, eat well, maybe in restaurants, have your kids in gymnastics or some other costly activity, whatever. There are people out there that take public transit, don't eat in restaurants, put their kids in city run sports activities and rent an apartment.
A little friendly advice is in order here. Most people don't make as much as you do. Some of those people may not be sympathetic to your situation.
It seems like your major gripe is that he isn't as motivated as you would like him to be and hasn't contributed to the financial well being of your family. That's fine, you're allowed to have an opinion on that. Rightly or wrongly, that has grown to resentment or you wouldn't have called him a deadbeat. What should you have called him then? Something more respectful than a deadbeat, even if that is what he is.
You are almost certainly going to be on the hook for SS, and it will likely be for a long time, maybe life. He is definitely going to participate in your pension as part of division of family property. Your intution is correct that you should have left the marriage a long time ago if this is only about money. Is this just about money? I bet there is much more to it than that. By staying in the marriage you gave your implied consent to an arrangement that is going to cost you big time to get out of.
You seem to have a good sense of how this is going to play out. If you haven't already, you should prepare your financial statement and do all the math to figure out what your equalization payment to him will be as well get some good counsel on your SS obligation.
Go see a lawyer for a free consultation. The first thing the lawyer will give you is the Form 13 to be filled out. Better still fill it out to the best of your ability before seeing the lawyer and bring it in with you.