Why was a sacrifice needed at all?

[nobspeople]

It's said Jesus came as a sacrifice for the sins of mankind. But to whom did the sacrifice matter? God? If Jesus was also god, in a way (like some claim), he was sacrificing himself to himself...? That doesn't make a lot of sense.
If Jesus is not god, then Jesus sacrificed himself to god. Why does god need a sacrifice at all? Some would say 'god can't be with sin' or the like. But why not? Surely, if god is the god it's said it is, god could change any 'rule' set up (as god itself had to set up the 'rule') and not require such a painful, terrible sacrifice? Isn't god 'enough' that being in its presence would, for lack of a better term, vaporize or negate all sin? God is greater than all sin (as some claim) then why is a sacrifice needed)
For discussion:
Why would god need a sacrifice if god created everything that is and had the ability not to need a sacrifice at all?

[1213]

....But in principle taxation is the same as paying for work - we pay people to provide our water, take away our trash and provide our electricity. It's too easy for people to think that these things are a natural product that we have a right to. ...

Maybe in principle, not in practice. If it would be like paying for work, it would be arranged the same way. Why do you think government is not paid the same way as electricity is?

[TRANSPONDER]

The principle is what makes the definition. Even if slavery is the most benign and humane ownership of persons imaginable and paying taxes to a government that overtaxes people and doesn't provide athe services it should, one is still slavery (ownership of people) and the other is not(providing a service in exchange for payment).