Now with the UK's departure, employers may struggle to fill vacancies (and indeed it appears they have been - see link below), so the poster was sarcastically suggesting that they can't wait to see pro-leavers performing these tasks because it seems like in many cases UK nationals aren't willing to perform these types of roles.
The nature of the role is irrelevant and the poster wasn't suggesting that pro-leavers should be subject to degradation!
https://www.theguardian.com/business/2019/oct/11/tonnes-of-c...
I'm not from nor living in the UK but I sure hope things work out.
My post was a dig at the idea that all the UK needs to allow into the country is highly skilled people. I don't buy that argument.. But lets see.
If the cost of goods increases, it won’t likely be severe since it serves the entire population while only a small percentage of the population produce the goods. Also changing prices affects demand independently from cost of production.