Having read through Nick Timothy's resignation letter [read it here], this really stood out to me:

because modern campaigning techniques require ever-narrower targeting of specific voters, and we were not talking to the people who decided to vote for Labour.

This implies modern campaigning is about winning, about getting power, about putting your party ahead of the country.

When we look at the millions spent on campaigns, these are no longer used to broadly inform on policy, but have a very simple target in mind - to swing a vote; potentially even on just a single issue.  Now that we have this capability, is it ethically or morally right to fight an election with such a narrow strategy in mind; or should the manifesto have a more prominent place, making sure that all votes are ensured of a fuller context to their decision, rather than gamified with single issue targeting?