Personal Data Stores (PDSs - https://goo.gl/HVTdup) are a mechanism for allowing citizens to take back control of their personal data. Making a statement about how government services will support such systems in future would strongly stimulate the market for them. Additionally, working with the major digital tech companies would hopefully inspire them to become involved.
Very large numbers of people are concerned about how the government and the private sector use their personal data. Such systems allow them to regain a level of control.
Having an ongoing working group supporting this would be a strong message and a great first step.