There aren't any legitimate scientific objectives (meaning we're excluding things like "studying sex at 1/6 G") people can accomplish on the moon that robots ca

There aren't any legitimate scientific objectives (meaning we're excluding things like "studying sex at 1/6 G") people can accomplish on the moon that robots can't. And manned spaceflight is about a x20 multiplier, not x5. So it should really be "100% of the objectives for 5% of the cost". Which, in a nutshell, is why we stopped sending people to the moon.