Why does mag witch say he will get pleasure watching Pip spend money?

Miss Havisham wants to see Pip spend money because it reminds her of the broken promises and heartache she experienced in her own past. She derives pleasure from seeing Pip fall into the same traps of materialism and love, as it validates her own bitterness and sorrow. Overall, Miss Havisham's desire for Pip to spend money is tied to her own psychological issues and desire for revenge.