Left-wing Biden and Starmer?

Your editorial suggests "the no-nonsense vice-president elect", Kamala Harris,should be given the job of keeping the left-wing of the Democratic party "in line" if they challenge Biden for slipping "into his old, middling ways" (Joe Biden faces a massive challenge. But, for now, let`s celebrate a powerful victory, 08.11.20). Isn`t this the wrong way round? As the editorial also states, Biden made a "calculated" move, "shifting leftwards" in order to gain votes by "embracing the progressive agenda". As the election victor, isn`t he now obliged to carry out his pledges? That is, after all, what a "decent, honest" leader would do, and, indeed, how democracy is meant to work! Harris is the one who should be ready to "pounce" if election promises are forgotten. The parallels with Starmer and the Labour party are obvious. Here`s another party leader so keen on party unity he was willing to pledge a left-wing manifesto in order to win his leadership election, and already being doubted for his sincerity. Both Starmer and Biden clearly need to remember their parties` recent histories, and reflect on the reasons for too many years of Conservative and Republican dominance.