In preferential Systems you must chase the centre, in the USA it might be trains versus cars, in Australia because both sides are chasing the centre they will both agree on a train line it's just the specifics they will argue about which believe leads to better outcomes.

At least from my experience I would say change of government won't lead to cancellation of a project or reform just an expansion or contraction in scope.

You can't do something like implement a 1 child policy and stick to it for decades causing a demographic collapse because it wouldn't have broad appeal from the population.