What used to be considered conservative values... are increasingly becoming more mainstream values.
For many years I have advocated 'redesigning Parliament' in a variety of ways - elect the Senate, do away with the 'confidence convention,' permit freer voting, strengthen the role of back benchers and committees, do away with ineffectual 'take note' debates, restructure question period, and so on.
When we classify an issue as a 'shield issue' it is usually because we feel that someone else occupies the high ground on that issue. We feel we can't win on that issue and so we adopt a defensive posture.
There are more effective ways of tackling environmental problems including global warming, proliferation of plastics, urban sprawl, and the loss of biodiversity than by treaties, top-down regulations, and other approaches offered by big governments and their dependents.