> The key is to make it so easy to do things the right way that it's hard to mess it up.

Before you roll out any tech fix, you need a policy fix:

"If you use you personal accounts for any official business, you will be terminated and held criminally liable."

EDIT: If someone from the USDS sees this, perhaps mention it to the US CTO and POTUS. I hear executive orders are a big thing for the next 12 months.