Ability to change default for Clean Working Directory checkbox

We have lots of projects, hundreds, and the current default for cleaning the working directory after a job completes is unchecked. This causes us a disk space issue, since jobs run randomly eventually on every local build agent. A job that takes the current default value to NOT clean the working directory eventually takes up space equal to size of their checkout directory times the number of local agents.

We have to go through and uncheck this option behind project teams on build jobs. It would be nice to have an admin setting that controls what the default value of this checkbox is for new jobs.