Apparently the increase in reputation for attaining privileges is coupled to the full design, as was mentioned in our graduation announcement Congratulations! Japanese Language is graduating!
In the coming months, the site will receive a full design from one of our designers, which will be packaged with an increase in the amount of reputation needed to access each privilege.
The levels can be seen here in the help center, the highest level being at 25,000.
I'm counting about 10 active users with over 10,000 reputation, who will have "access to moderator tools".