1. It could increase government transparency. Most tweets that politicians want to deleted might just be spelling errors and social faux pas, there might be an occasional tweet where a politician slips up and tells the truth.

2. No need to violate Twitter API terms and conditions caching/saving a politicians deleted tweets.

3. It would be good PR for Twitter. It would help after canceling Politwoops` API access. This was because they had violated the API terms and conditions when they saved politician's deleted tweets. If politicians can't delete their tweets, there is no need to use the API to save/cache them.

4. It might be easy to accomplish. No one would take a politician's side arguing against it. Politicians, who are elected officials, aren't like the average citizen. They understand that they don't have the same expectation of privacy as a normal citizen.

5. Plus, a possible benefit for politicians: I think the average person might pay more attention to a politician and their tweets if that politician agrees to use a "live", unfiltered twitter account.