The deaths you refer to in the UK have nothing to do with corruption. They are the result of a combination of things, including inefficiency, the refusal of some elderly people to accept help (even when it is available), and a very complex system of benefits. Corruption is not even a tiny part of it. Try to understand this.
As for the Spanish political system, yes – it is more corrupt (by far) than the UK. That is why so many mayors are in jail. Here is an independent table:
These IS some corruption in the UK, mostly involving weapons dealing, very large companies, oil reserves, multi-million $$$ business deals, etc. There is NO corruption when dealing with pensioners getting their winter heating allowance. Take it from me. I have lived in Egypt and Morocco. I KNOW corruption when I see it.