Most TS information is protected by SCI (Sensitive Compartmentalized Information) which means that these secrets are sectioned off into smaller groups so if one

Most TS information is protected by SCI (Sensitive Compartmentalized Information) which means that these secrets are sectioned off into smaller groups so if one group is exposed/infiltrated other sections are more likely to be safe. This also means that being "read into" one section does not mean you have access to other sections. My point is that the TS clearance mostly describes the process to get information not the collection of information itself. I doubt there are more than a 100,000 people that know any one (actively guarded) secret.