if you're worried that an unqualified Eastern European worker with no experience can take your job, then maybe you should have worked a bit harder at school!"
Okay, this type of thing really pisses me off. 
And there's so much to say about it.
Even as late as the 80s and early 90s, many Northern comprehensives were still operating on a kind of informal "manual work" or "office work" mentality towards pupils. If you were intelligent, you were destined to work in an office as a secretary or clerk. If you were not so intelligent, you were destined for a trade or for factory/mill work (despite the fact that almost all the factories and mills had closed down by that point, which meant a lot of kids left school with no employment possibilities).
The almost subconscious attitude was that the kids who would become the professionals were at the grammar and private schools. There was no channel at my comprehensive school to funnel smart kids into a professional career in science, law, medicine or technology. And this was a time when comprehensives were mixed ability, and the clamour for a grammar place in our area didn't really exist.
However, if you left school at 16 back then, you had the option to go to a local FE college to resit your GCSEs and A levels at a later date. A lot of people I knew did this, and quite a few who had gone to sink secondaries ended up at universities through this route.
All that disappeared under Blair's Labour government; funding for FE just vanished in the noughties. Now, if you want to take an A level over 19, you have to travel twenty miles to the nearest city. So if you screw up at school, the only option to you is pretty much an access course of some description, which means you have next to no chance of getting into a traditional profession or a Russell Group/1994 university.
So bear this in mind when I say, in the North where I am, there are only really three kinds of jobs that pay over about £26k pa (the cut off point for household income for UC). You either need to run your own business, work in the public sector or be a manager at Aldi.
The first requires you have a valuable trade or profession, which means you've been able to complete trade qualifications (which is problematic as I mentioned above as they require apprenticeships to master tradesmen), or you've obtained a professional degree with appropriate experience, or you've inherited a family firm.
The second, inevitably, now means you need a degree, possibly a postgrad.
And for the third, well, not every one can be a manager at Aldi.
The rest is all NMW, and by default, that pretty much means you need some form of state help if you have a child.
So to say "you should have worked harder at school" in order to get a better job, well, that assumes you went to a school where it was possible to "work harder" to get somewhere. And it assumes that working harder at school equates to the ability to get a better paying job.
These things are simply not givens in my area of the North.
In fact, in my constituency and the next one along, we don't have a lot of Polish workers because there are no available jobs to attract them here.
But what we have experienced is a substantial amount of immigration of European-minority groups with low to no skills or English language ability, a significant number of asylum seekers from the Global South and war-torn areas of the Middle East, and an upswell of chain migration encouraged by Labour's 1997 abolition of the Primary Purpose Rule.
Now we can cope with this where we are, to some extent, because the numbers are sustainable, although it is pretty obvious the first generation of these migrants and asylum seekers will never obtain any kind of employment in Britain during their lives. And to be honest, I've no idea what some of them will do about starting families and integrating into society because they are very isolated within the wider multi-ethnic British culture of the area (though we try our best with church-run English language classes and outreach programmes).
However, the next two constituencies along cannot cope with it. The numbers have been too great. All it has done is imported poverty into areas that were not that wealthy to begin with, and didn't have a lot of employment opportunities. And that, in turn, has caused working class and middle class flight (of all ethnicities) to semi-rural towns and villages, which has, in turn, created extraordinary demographic pressures on these areas.
Hence my initial post about everything just pretty much running at stress levels in areas where there is not a lot of avenues for weath creation. And people look at Labour and see that all this began under Blair and that Labour today simply will not recognise it.
Hence Brexit; hence the Tory votes.