I don’t think it’s morally wrong not to want to work. If you would stop working if you won euro millions, then neither do you. It’s just about terms. But there potentially is an issue in a partnership being unequal, or the expectation that you are entitled to be supported by the state or others to do so. But the same applies to running the house, too. If your partner expects you to do more at home to free him up to work (and he probably does, even if unwittingly) then that’s an unequal partnership, too.
I suspect many working partners have no idea of the load their SAHP is taking off their plates - it’s invisible. Sure, you get free time, but what isn’t free (and it’s not piffling) is stuff they don’t have to do. Or even think about doing. What you can achieve when your home is run by someone else is TOTALLY different to the energy you have when you are taking on some of that load. You need to do a time and motion study of what you are doing - every second, from daily chores to random stuff like taking the kids to the dentist, sorting out kids’ outgrown clothes and packing for holidays, and to present it to your partner. If he can honestly say he will take on half of that (including taking time off for dentists etc) and does so, or will pay someone to do it, or take the hit in quality of life, then yeah, go back. I can virtually guarantee he does not know what he’s agreeing to without you spelling it out. Running my ordinary home took about 20 hours a week, not including childcare or new projects (this one is more, because of shopping around, shopping secondhand and flat pack, growing veg, selling things etc). Is he prepared to put in those hours, or pay someone to do it? Because if not, He’s just as morally wrong to be expecting you support him to ‘just work’ by running the house, as you would be if you expected to be entirely free from the responsibility of working in order to run the house. He can’t have it both ways.
I also calculated approximately what it might cost to replace me at home if I went back to a good job (assuming I can get one) From someone to ferry DD to paid activities instead of my free treasure hunts and cheapy crafts, to daily housekeeping, weekly cleaning, gardening, monthly maintenance, home improvements, dog walking, takeaways and ready meals instead of my batch cooks and fakeaways, full price shopping delivered instead of me going to Aldi and b and m, new clothes and furniture instead of second hand etc etc. it was about full time minimum wage. And if that’s what it costs to replace me, that’s the value I’m adding to a family budget. Again, you can’t have it both ways. Either it’s worth something, or it’s not. You cannot have freedom from those things by expecting a partner to do them and simultaneously expect that partner to work in addition, and still call it equal. You must either agree to give up your spare time, or your spare money to fill the gap. If you don’t, you are expecting a partnership that’s also unequal.