Work out pt nmw job and add on tc and cb it nowhere near equates to that sort of salary, it's a small top up not another wage.
This is where people go wrong, they believe that a low wage with a top up equates to a much higher wage and it doesn't, nor should it.
Well no, actually sometimes it does. If you have enough kids, 3 or more. I've done loads of legal aid assessments so I see what people have coming in. It's certainly possible to receive only a sliver of tax credits. It's also possible to receive nearly as much as your wages, or more.
Maximum child element is £2780 p/a per child (more if your child is disabled but let's leave that out of it for now). If you have 3 children, that's £695 per month and if you have 4 it's £926. For now anyway. 24 hours a week on NMW is £780. You'd also get working tax credits at this level of income and hours.
This includes families with a SAHP, though it's true that sometimes two earner families get much bigger awards because of childcare costs. If you earn 20k with a SAHP and no childcare costs, you'll get less than a couple earning 2 x 10k with some childcare costs. I don't know why your household got more when you put down that you were working gilly but iirc your circumstances are atypical anyway: weren't there things like dividends and pension payments involved?
But anyway, the salient point is that if a poster came on saying she and her partner and 3 kids felt content with one of them doing 24 hours a week at NMW, I'd believe her, but a large part of the reason for that is that their earnings would be a minority of the household income and thus they wouldn't be having to live on them. This isn't bashing either- the people responsible for this situation are not NMW earners.
Or if you want a non-benefits example (except we do get CB) I don't earn much more than someone who works FT NMW. I'm financially comfortable too. Because I'm in a two income household and I do less than half the hours of the FT NMW person. If I were to post saying how easy I find my life earning 16k and then subsequently revealed my hours and second earner status, I'd rightly be told that my situation isn't remotely comparable.