"And I think the rolling polls put more pressure on them to sustain their beliefs and to improve their delivery of the policy and their delivery of the ideas so that they can garner support for whatever principle they're articulating"

This quote by Jim Bolger recommends that the use of rolling surveys can be helpful for politicians. By using rolling surveys, politicians are able to evaluate public opinion and adjust their policies and concepts appropriately. This puts pressure on them to ensure that their beliefs and policies are well-articulated and well-received by the public. This enables them to acquire assistance for their principles and ideas, and to make sure that their policies remain in line with popular opinion. In this way, rolling polls can be an useful tool for political leaders to guarantee that their policies are well-received which they are able to amass public assistance.