@dontalltalkatonce
No one's ever lazy on MN. It's always a mental illness.
SO true!
@PurpleDaisies
Those of us with experience in this area are saying it sounds exactly like depression/anxiety.
How patronising.
Lots of us on here (and irl) have experience with anxiety and depression... both having it and living with people who have it. Funnily enough, most people manage to still work more than 16 hours a week, providing money for themselves, the family, and the home. They have no choice, when they have no-one to dish out handouts to them.
I wonder how these people who constantly throw sickies, dump jobs left right and centre, stay 'not working' for months at a time, and get others to carry them, would cope if said partner (or parents) cut the cord and said 'you're on your own.'
No way in HELL would I put up with a man like the OP's husband . She is enabling him. Wouldn't we all love to work 16 hours a week, throw sickies every week, and get someone to fund this lifestyle?! 
Very rare I say this, but I would LTB. He is unlikely to change.
And yes of COURSE depression and anxiety are very real, but in some cases, the person is just a lazy freeloader. IMO the OP's husband is the latter.