Since the position is voluntary the liability and ownership of the actions taken by the elected are always with the people, as they are today. The volunteers must not be accountable for the outcome of any agenda items as those actions are decided in public forum and elected by unanimous vote. Meeting Agendas, a key component to building a political agenda, are used to handle the meetings and formalities. Clear instructions about what to sign and when to sign it are provided. The only expectation of the volunteer is to formally convey the Agenda to civil leadership through the normal protocols. But even that is not required. Civil leadership can proceed without the need of the formalities, to a point, until a formal meeting can occur. They can do this because they already have access to the Agenda and probably helped write it as they are also citizens.
To reiterate, the support staff are mostly the people we already trust to take charge in an emergency. The idea is to extend that trust so that we can separate the politics from governance. Once the election is over the government will govern as elected because the campaign is over and the only thing up for re-election is the next Agenda. Politics are used by politicians to get elected. After the election those same politicians need to become leaders and stop politicking for the next election. A political party, by its nature, will remain focused on retaining power. This will influence the politician back into politics and distracted from their leadership duties. A collective of independent representatives with agreeing views, without regard to “win” power, working together towards self governance can achieve this.
I would expect the elected to record everything and relay that information back to the people for indemnity. The Keepers(again, for lack of a better term) have privy with the right to closed door meetings and the elected are still bound by national secrecy laws. But we can rewrite those laws and the leadership that can be replaced. This will hold the balance of power against the civil leadership and keep them as always, servants.