I think there's one thing missing in your picture: Those workers aren't necessarily unskilled. Those who come from my country(Poland) at least are often colleg

I think there's one thing missing in your picture: Those workers aren't necessarily unskilled. Those who come from my country(Poland) at least are often college graduates. How do they end up there? Well, the pay is obviously better - especially for a seasonal worker. After all, the GDP per capita difference between the UK and Poland is close to 3x. The unemployment rate here is(or was before the virus) considerably lower than the EU average, so had they not gone there those people would've found jobs and contributed to the local economy. Instead we have this weird brain-drain in which the brains aren't utilized to their full potential. Ironically I'm currently a "seasonal worker" myself, only I work as a software engineer, not fruit picker, or any low-skilled labourer. Aside from that the coronavirus showed that this approach you present is unsustainable. Like I said before, currently there is so much demand for workers from eastern Europe (Poland, Ukraine, Belarus) that there's simply not enough people to fill all the positions. Also we have our own fields with fruit to pick - all that is going to go to waste. That's definitely "less food produced" - just somewhere you don't see it.