For example what is the Polish equivalent to NVQ, GCSE, O,level, A,level, S,level, City and Guilds. So you see, if I were an employer in the UK, who would I employ ?
I don't know, I am from Ireland and we have our own educational system.
I think GCSEs are what we call The Leaving Certificate but we have a very different curriculum to Britain.
I think the point here is people from any country outside of Britain have different words for educational levels, so how would anyone get employed in Britain if they are no ways of finding out what it all means.
I imagine many employees look to their experience, not just the qualifications.
Plus another question I would be asking is, how competent is your knowledge of the English language ?
That could be sorted out easily in the interview.
So what are they worth in Poland also ?
The same thing they are worth anywhere, outside of the very negative prospects you have pointed out, the best person for the job still applies here as everywhere.
The more qualified you are, the better your chances are of getting the job.