The background: five years ago my mum had a stroke which left her confined to a wheelchair along with some minor cognitive/emotional regulation issues. She's now living with her DP (who's pre-retirement age but is not working. He is also, quite frankly, fucking insufferable) in an extra-care flat with carers coming in multiple times a day. The two of them are relying on my mum's pensions, her benefits, and his carer's allowance. It's not nearly enough.
The problem: they simply don't have anywhere near enough money coming in to support the two of them. If my mum was living on her own in the extra-care place then she'd have enough money. If the two of them were living there and the DP was working even part time then they'd have enough money. If the two of them were living in a normal place and so didn't have all the costs of the extra-care place they'd (probably) have enough money. But as things are they've got way more outgoings than income and it's more than I and my brother can afford to keep offsetting.
Complications: Although my mum complains about her DP a lot (he is, after all, fucking insufferable) I think she prefers him being there to the thought of her being on her own. I cannot force her DP to get a job. My mum doesn't want to be on her own during the day so she's not going to force him to get a job. The two of them together are the absolute masters of sticking their heads in the sand and expecting me to solve their problems. I've tried again and again to explain that something's got to change but it's not sinking in.
My question: What the fuck do I do now? I've talked to the council and others about the benefits and I'm pretty sure they're getting everything they qualify for. I've tried to explain to my mum that either her DP gets a job or she's going to get further into debt but while she will agree with me when I'm talking to her, the next time I speak to her it's all forgotten. TBH I see her DP more as an incredibly irritating cock-lodger than a partner for her but I think she prefers that than the thought of being on her own. I live too far away to be able to go and see her every day.
Help?