I don't even know what you're on about now. The minimum wage in this country is around 75 quid for an 8 hour day. That's just fact. We had an incident here just weeks ago where sewing machinists in Leicester were getting paid less than half of that. The cost of living is significantly higher here. So if someone is working on £70 per day in China, I would guess they're doing alright unless they live in Beijing or Shanghai.
However, we don't know where these workers are. We don't know how much they're earning. All you shared on the subject is a headline grabbing 70p per shirt. There is zero context around it to work out if it is good or bad. But if as suggested they could do 100 shirts a day (so on an 8 hour day that'd be about 12 shirts per hour which doesn't seem unreasonable assuming they're just stitching up ready made parts and we're not expecting them to hand embroider a liverbird), they would earn around £17.5k per year. The national average wage in China is £9k per year. So they would be earning 90% above the national average. The UK national average wage is £35k per year, so that £17.5k in China is the equivalent of earning £66k per year here. Amongst their Chinese compatriots, their standard of living would seem good.
However, we don't know how much they get paid per day. We don't know where they live. We don't know their working conditions. We literally know nothing. So if you have an argument that we shouldn't import ANY products from countries with a low cost economy, let's have that discussion. However, we all use goods made in China every day. Our last shirt was made in Thailand where the national average wage is below that of China. We have goods made in these regions not because of their expertise, but because labour is cheap and worker rights is low. I believe this to be a bad thing, but is the very basis of our entire economy, not just LFC and Nike.
I am 100% confident Nike get their kits made as cheaply as possible. I am equally confident other major manufacturers would and do behave the same. And those that don't would probably like to, but don't have the same scale to achieve the savings Nike, NB or Adidas can.