Sometimes I get upvote surges, and I want to know who referred to the question page in question.
I don't think it is a good idea to be able see who opened the page or voted on it. For the first, privacy is the strongest argument, for the second, we have gone over that a million times: votes are anonymous.
I suspect this would also be useful for some voting fraud investigations / other moderation investigations.
But that is not to you, but to moderators. There are cases where automatically flags are raised. Then moderators and employees can investigate the suspected voting fraud. This is covered in the tools for moderators already. They get the information they need, or else employees can gather that information. There is no need to give that information to other users.