This is ridiculous! I've never heard anything like it!
How many people around the world do you think want to work?! How many of those do you think HAVE to work because of well, life?!
We can't all just decide one day that we don't want to work, quit our jobs and live off someone else!
The problem isn't your outgoings. It's the fact that your partner is lazy and bone idle and you're enabling that.
Lots of people (me included) have children, work 40+ hours a week and STILL manage to do a food shop, get the kids to and from school (your children are more than old enough to do this themselves), organise life, make tea and still have some time for ourselves - amongst the other stuff that life brings. Seriously, what on earth does she do all day long?? How can she be so busy??
Have you ever tried doing a food shop? It takes a couple of hours a week AT MOST. Booking an appointment? 5 mins - how many appointments does she need to book every day?!
As for her business. She needs to research to change the algorithm. Or get a job. She won't though because you're letting her laze around spending money all day whilst you worry about getting the money in and making it last. How dare she!!!
Not a chance would I be working my arse off and let my dh announce that he doesn't fancy working any longer and leave it all to me. I wouldn't even entertain him. If he was being serious, I couldn't be with him. I'd divorce him if he thought so little of me. If he was happy for me to do that, I'd expect that he thinks more about the shit on his shoe than his wife.
Open your eyes, op. She's taking you for a complete mug and you're allowing that!!!