The UK system of benefit conditionality forces people into these shitty jobs. The don't have a choice. They need to take the work or lose their benefit. There's an assumption from the Department for Work and Pensions that any work offered in the UK is legal. That's a reasonable assumption, but they could do with being a bit more proactive at protecting workers at the scummier end of the market.

https://www.theguardian.com/society/2018/may/22/benefit-sanc...

> For those people interviewed for the study who did obtain work, the most common outcome was a series of short-term, insecure jobs, interspersed with periods of unemployment, rather than a shift into sustained, well-paid work.