Well, our leaders serve two goals: The voters' will and the fairness of the law.
Nothing requires to vox populi of some issue to agree with its own opinion of five minutes ago, or its own current opinion in a similar issue. Your opinion as voter can be as fickle as it pleases you. The law requires fairness, though, and our leaders are the unfortunates whose job it is to tell the voters about the longer-term principles and try to shape people's opinions. To make them less fickle and more principled.
Now, which principle? I don't mind if a particular politician or party tries to shape voters' opinions around the principles in that politician's or party's program.
Nothing requires to vox populi of some issue to agree with its own opinion of five minutes ago, or its own current opinion in a similar issue. Your opinion as voter can be as fickle as it pleases you. The law requires fairness, though, and our leaders are the unfortunates whose job it is to tell the voters about the longer-term principles and try to shape people's opinions. To make them less fickle and more principled.
Now, which principle? I don't mind if a particular politician or party tries to shape voters' opinions around the principles in that politician's or party's program.