An odd sentence

An odd sentence

The sentence comes from a test as follows.

http://www.okpass.com/YZboard/view.php?id=603&code=data_1&start=0&s_que=&mode=&field=&page=2

- You have more money than I.

The test says this sentence is all right. But to me it doesn't seems a good sentence, though not a wrong one altogether.

(Am I right?)

If I were the one that made this test, I'd better use...
- You have more money than I do.
- You have more money than I have.

(Am I right?)

Some other teacher suggested the sentence below as a complete sentence for the original one, which seems much odder than the original one to me.

- You have more money than I have much money.

I don't think this sentence can be used in any real situation, that is, almost a wrong sentence.

(Do you agree with me?)