Once you hear the lyrics, it sounds more sinister. I had a shower epiphany where I realised it sounds like a song about Jews being taken away to Nazi death camps, only to be told they were going to "work camps" or something similar ("they've got everything you need [...] satisfaction guaranteed"). They're coming to take you away, take you today. They're not asking you to come on this Mystery Tour, they're forcing you.
Once you hear the lyrics, it sounds more sinister. I had a shower epiphany where I realised it sounds like a song about Jews being taken away to Nazi death camps, only to be told they were going to "work camps" or something similar ("they've got everything you need [...] satisfaction guaranteed"). They're coming to take you away, take you today. They're not asking you to come on this Mystery Tour, they're forcing you.