We live a simple life and don't pay for TV (thank god they don't service us out here). I have considered limiting his access to our money... I have hesitated because I'm not good with managing finances... I'm good at making money and squirreling it away, but when it comes time to pay bills I am so forgetful... but perhaps your right... all I have to remember is to pay three bills a month.
Well, you're on here so I'm guessing you have a computer. There are programs on every computer that give you a calendar, or Google has a calendar. Put the bills that are due on the calendar on the day they are due, and set it to remind you. You can usually set it to remind you at least a few days in advance, and when that reminder comes up, you can "snooze" it to remind you again when the bill is closer.
If he's not able to control his spending, then you have to take over and do it for him. My boyfriend is the sole income for us, and while I let him have a lot of freedom since he does earn the money, if money is tight or getting tight, I will let him know and tell him he can only spend X amount. He respects that because he knows that I'm not trying to just be a b*tch, but that I'm trying to keep us out of the poor house and working towards our goal of being able to buy a house at some reasonable point in the future.
When you have kids, especially, you have to be careful with money. You don't want to come down to a choice between paying the electric bill and feeding your kids. And if that means that you have to treat him like a little boy and give him an allowance, well, that's what you do. If he argues with you, then you tell him to get a job. If he takes that as nagging, oh, well. You need to stand up for yourself, and your children. While you're at it, if he doesn't want to get a job, and wants to stay home with the kids, then he needs to act as the stay at home parent: he needs to play with the kids, clean the house, prepare the meals, do the laundry, etc. You don't mention whether he's doing any of that, but given your complaint that he's lazy and all they do is sit in front of the TV, I'm guessing he doesn't.