Part of the problem (as I see it) would be co-ordinating it globally. Logistically, it's not something that could simply occur at the same time. Even within the one country, time-zones can be a complete nightmare, and that's not taking people's personal schedules into account either.
Should there be an inbuilt advantage to the game for someone who is single and unemployed (ie. fewer responsibilities and a flexible schedule)? Hell no.
I think the current system is as about as equitable and simple as you can get.
http://with-malice.com/ - The half-crazed ramblings of a Lakers fanatic in Japan