The last point is so insidious.
In Australia we let shittons of students in who will work the low end jobs in hospitality, and for years made it a requirement of backpacker visas to do farm work if they want an extension as well as bringing in cheap labour for seasonal work from the pacific.
The US has an entire underclass of Central Americans doing this. The UK used Poles, the Germans used Turks, the French used various Africans.
Leftists in these countries think unfettered immigration is great and noble whilst whinging about low end wages year after year and rightists are all too happy to exploit cheap labour for businesses that would often otherwise be unviable.
No-one wants to reckon with the reality of it though because it immediately devolves in to accusations of racism.