So we'd have nearly 300 million people serving in the military?

No... we'd have far fewer people voting, with the assumption that those people who had the privilege of voting were invested enough in the well being of their country to take the time to make informed decisions.

Of course, with the voting group being a non-representative subset of the population at large, chances are that their "informed decisions" would take a slant that was not necessarily advantageous to the country. [warning: curmudgeon alert!] But, what else is new? It's not as though recent elections have been to the benefit of any but a corrupt few.[/curmudgeon alert]

tanstaafl.