If they had hired under a more complex pay grade structure, they would have been fine.
This is relevant to tech companies which may use fairly simple level structure.
So, the garbage workers -- men -- used strikes to extort illegal, privileged pay raises for themselves?
(Although I'm not really sure what my point is - that the council's lawyers should've (if they didn't) made that argument? - because unlike gender I don't think union membership is a protected characteristic per Equality Act 2010, obviously there are some different rules like you can't fire someone for being a member of a union, but paying someone less because they're not a member of a union seems probably fine? But anyway, as a public body the council has extra requirements for equality, not less, and the intention probably doesn't matter at all.)
Did you read your link before posting your commentary about it?
I was only answering what 'equal pay means in this context', and I did so succinctly because I think they already knew just doubted themselves or would be familiar by another name with a hint, take it up with the employment tribunal if you don't like this particular equivalence.
https://www.anthonycollins.com/insights/news/landmark-ruling...
Birmingham City Council v Abdulla and others [2012] UKSC 47. https://www.bailii.org/cgi-bin/format.cgi?doc=/uk/cases/UKSC...