While it is well understood there is an urgent need to address global environmental problems, there is less understanding around how these problems can be addressed. At each level of government, policy is initiated as a response to a perceived problem. However, research has shown governmental policies are overly generalised which creates a universal approach, with little regard for contextual difference. This paper seeks to push back against unspoken assumptions surrounding Education for Sustainability (EfS) policy processes from development to implementation, showing that context is important in the interpretation of policy. Through a mixed method survey, the findings illustrate how EfS policies are often overloaded with infrastructure rather than educational benefits, minimising the policy objectives for sustainability as a cross-curricular priority. Three key points are raised to advocate for a new 'systems thinking' approach to policy implementation, with ramifications proposed to enable a more effective enactment of Education for Sustainability into curriculum.