@NewtonMark IMHO, above a certain size of organisation, failure to pay people properly should be statutory wage theft.

That is, large organisations should be deemed to have implemented wage structures deliberately, and if they get it wrong they are deemed to have done so deliberately. "Big enough and ugly enough to know what they were doing". Not an error, not a mistake, not an oversight.

It should not be possible to escape without meaningful penalties applied to the organisation and (very important!) those in charge of it.