SPRINGFIELD — For anyone wondering what Illinois’ financial doomsday looks like, state Rep. Greg Harris painted a picture today.Without a budget plan, 36 percent of social service agencies would be closed within six months. A total of 80,000 people needing mental health treatment, 69,000 people needing substance abuse treatment and 40,000 people with disabilities would lose services.That’s not to mention an inevitable downgrade to the state’s bond credit rating to junk status, making borrowing more …