What else does the SAFe principle, unlock the intrinsic motivation of knowledge workers, require besides...

According to SAFe Principle #8, "Unlock the intrinsic motivation of knowledge workers," beyond purpose and mission, this principle emphasizes that:

“Management sets the mission with minimum constraints… Workers themselves are most qualified to make decisions about how to perform their work.”

This aligns with promoting autonomy, mastery, and purpose—autonomy being enabled by minimal constraints from management.