My husband worked in retail management 20 years ago. He saw the collapse in proper waged roles, and decent hours, with overtime rates to recognise unsocial hours, get hollowed out while he was there. When apprenticeships came in they knocked out people who had, before, been properly paid to do the exact same job. No new roles created whatsover; just halving the pay of new recruits. And they offered one off windfalls to existing staff willing to sign away overtime rates for evenings and weekends, too, while warning them that only people on normal pay rates would get offered those extra hours - so they all signed. Of course they did.
He changed job sector completely and retrained himself. But yes, this is a way to exploit staff, who previously had all the normal rights as employees.