Sixty Billion?! I'm pretty sure the Earth can't support that many humans at once, even in the year 20X7.
I don't have the original Japanese RAWs, so I can't be sure what the original text had.
六十億 != 六百億 (6x10x100,000,000 != 6x100x100,000,000)
The dad is already giving me similar vibes to Ed and Al's father in Full Metal Alchemist. Whether that's an insult or not, I'll leave up to everyone else.