The ten-to-one manpower ratio includes ALL security force personnel.

The 10-11 million figure comes from my best guess-timate of what such a hypothetical country could expand its forces to, if hard-pressed, and without becoming totally bankrupt.

There are more likely 45 million of the people you mentioned, in the country you made reference to. And, if the SHTF, at least 90% of them would stay home, and watch it all on tv.