In reply to:
Hallo spaceboy, petshopboy remix
Remember that the Pet Shop Boys bit was put in by them and NOT Bowie, importantly, I think Bowie was anti these new lyrics but was enetually convinced by the record company that is might sell better with the 'retro' lyric. Nonetheless, I would agree that the original is related to Major Tom.
Other than that Time Will Crawl is not related, but your points on NGO are really interesting.
At least I'm not a whore