I find the discussion whereby people complain about white working classes being denigrated; and in the same breath complain about identity politics very ironic. That is also identity politics- nothing wrong with it but own the fact you are also participating in it.
There is also a lot of weird mixing up of facts to suit your agendas. Apparently single, attached migrants only come for a few years and live in caravans in large numbers. Yet you also complain about them settling in and bringing over family members- which is it?
You complain they are unskilled/uneducated and thus a drain and yet then say the British education system means they cannot complete with migrants on skills levels. which is it?
You complain about people coming over without jobs and then complain about overseas recruitment. Which is it?
The truth is probably a whole mixture of industry specific, region specific issues, individual specific issues. So not a simple issue for simplistic solutions.
In my area there is very low unemployment and a high need for agricultural/ food production workers in semi skilled, very hard labour jobs; skilled IT workers; skilled workers in others industry like care homes and haulage. Those few locals who are unemployed are because they are older, health problems, learning disability; criminal records, and other barriers. Employers are complaining about labour shortages (though in my view are too slow to train people up)
So if the UK workers in areas of unemployment want jobs they are available in many parts of East Anglia. So why are people not internally migrating?
It is not because employers favour migrants per se because I know British people working in all of those industries and often quickly advance up the ranks from shop floor to supervisors. Not all migrants are better workers (though many European migrants are younger, fitter , have previous agricultural experience or are selected for a particular skill/qualification).
So why is it people are not internally migrating? Probably a industry training/housing/family/tradition/financial risk issue which Govt, industry and British people are going to have to address.