As I understand it, he helped get an associate into the Oil for Food cycle; this guy then drained money from that UN plan and gave money BACK to Saddam, AND to a campaign fund. The fund is NOT a Galloway fund for re-election, but an anti-Iraq War fund.
Think of it this way--what if a friend of Nancy Pelosi (if there is such a creature) got Pelosi to get him into this deal. He then gave some money to Saddam, and gave money to Not In Our Name?
I think it's pretty huge. I can't be exact about a number on your scale, but I will say it's more than a 5, IMO.
The accusation is that Galloway's Mariam fund received money from an oil trader who is alleged to have abusing the oil for food programme.
the Mariam fund was set up to provide Leukemia treatment in Scotland for a six year old Iraqi girl