LOL are you serious.Do you eat? A large proportion of UK slaves seem to be in farming, doing the jobs that few Brits want to do!
https://www.fwi.co.uk/news/shocking-extent-of-modern-slavery-in-agriculture-revealed
If it was such a problem, then the farmers themselves would be tending to the local prison allotment for employing slaves.
Anyway, I've just checked a few of our fresh food produce in the kitchen, and it says on the tins that the majority of it comes from abroad. My conscience is clear.
But you have touched on something regarding the brits doing these kinds of jobs. But perhaps cutting benefits for scroungers to make them work and earn their keep is a topic for another thread.