I still don't understand the question.
But if you mean can people contribute financial backing to a political candidate, yes, they can but it must be transparently done. There are anti-corruption regulations which must be adhered to...and constant rows over people making contributions obscurely.
For example, in the most recent "scandal" a businessman anonymously contributed to the finances of the party he supported. That is not allowed.
He did so via a friend, to protect his anonymity. The Press detected it and now everyone knows his name...
I wouldn't put scandal within inverted commas, it was a scandal. Contrary to what Labour politicians might suggest, the party is corrupt, so it is perfectly feasible to believe that the donations were shrouded by this same corruption.
Everything is relative. The Tories were much worse IMO.
Corruption hasn't really been substantiated yet, has it? For example, bendy Wendy of Scottish Labour seems not to be guilty.
I heard that businessman in radio interview, he just didn't want to be pestered by the press, so passed the funds through his friend.
Corrupt? Possibly. Naive at best.
One might say definitely corrupt, depending on where you're coming from and which political affiliations instruct your opinion.