Because he wants to dispose of all three of them, and start over with a new one, whom he'll probably be disappointed with and eventually destroy too. This is what aristocrats are like.
The simple explanation is that this guy has suffered some sort of memory loss wiping out everything that he did between the storm and waking up in Tokyo Bay. The problem with the simple explanation is that, while his clothes might be modern, this guy does not look like a man in his sixties. So...
What makes you think there is one? There's no moral to the original Snow White story -- the part about her earning the dwarves' love by cleaning up their home was added by Disney.
Alice: Of course, when I do transfer, I won't be your captain any more.
Team: Don't worry, we'll follow you.
Alice: (unvoiced) ... oh, poody. (Yes, even in her thoughts she's a well-brought up young lady.)