Schedules of elected officials

Politico is publishing Obama's daily schedule, to the extent they can. I think the daily schedules of every elected official should be published, including names of people they meet with and the agendas for such meetings. Why wouldn't we voters/taxpayers be entitled to this information? Sure, occasionally there's something that needs to be secret for national security purposes, but other than that, we should know how and with whom every official spends their work day.