For the group, it's good (for some definition of good) if everyone votes. For the individual, their payoff from voting is extremely likely to be zero: if you voted, and your chosen MP won by a single vote, your trip to the polling station made a difference. Any other outcome, and you could have stayed at home or gone to the pub instead, with no change in outcome.
Whilst I'm not generally in favour of the state forcing people to do things, I wouldn't mind if I (and everyone else) were forced to vote at every general election, with some potential penalty to incentivise compliance.
Whilst I'm not generally in favour of the state forcing people to do things, I wouldn't mind if I (and everyone else) were forced to vote at every general election, with some potential penalty to incentivise compliance.