I think that any situation where minimum wage laws have produced vast swathes of the population in a bog standard family setup (2 able bodied adults, say with 2 kids)... where they cannot afford even the most basic lifestyle in most of the country, that is a untenable situation.
E.g. earning above NMW, 6 quid an hour, 2 people, 37.5hr weeks like me = £450 income per week
£337 after tax/NI at basic rate
So £1350 every month.
Say also that they live in a shitty damp flat with a great mortgage/rent price of £450 (bargain!) like our first place 3 years ago.
That leaves £900.
Council tax takes £110 of that (going by ours in a shit area).
That family now has £790.
They spend £50 a week on food (you can just about do this with massive cut backs i.e. cheap meat or no meat, batch cooking, see Sainsbury's recent PR stunt)
That family now has £590 to live on.
£60 each commuting costs (going by my bus pass fares - i know you couldn't run a car on that, but let's err on the side of cheap caution here)
That family now has £470 to live on a month.
Cautiously spent utilities £80/month total.
House insurance £20/month.
School uniform/cheap Asda plain office work clothes easily £20 a month through the year.
One or two school trips in the year or books/pencils, say £5/month.
£345 left over.
You also have to pay for dental appointments/treatment, glasses, prescriptions, ad hoc emergencies like the front door's window getting smashed by yobs (guess what happened to us last month?), and so on from your excess £86 a week.
You can cut out haircuts, any food during the day, any luxuries at all.
But you still have to pay childcare, probably, unless you're lucky enough to have free childcare from your own parents/neighbour/they're in school and old enough to avoid that cost.
You cannot plan to put any money into savings to take advantage of cheap bulk buys at the supermarket, or buy 2 get 3rd free offers. You can't buy moer expensive ingredients which last that bit longer. You're probably already buying things that are reduced due to damage or on its food safety use date.
that situation above is what means we have such a thing as "working poor" in this country
And the scenario above even assumes you have 2 able bodied adults who can find fulltime jobs ABOVE NMW within cheap commuting distance (how many people are that"lucky"?)
IMO, NO ADULT in this country should be working fulltime and be unable to afford more than a subsistence style of living. and that's what it is on NMW.
This country needs to start paying its workers a living wage, not a minimum wage.
For too long, the country's lowest paid workers have effectively been subsidised by TAX PAYERS - the government didn't introduce a livng wage, so just to LIVE and EAT people have needed to rely on tax credits, child top ups, free eyecare and dental vouchers, and whatever.
What kind of mess are we in, where even if you work really really hard on this "minimum" wage you basically can't afford to live much above the threshold of poverty?