Well, I don't think so, lost bitcoins are lost, and it's up to their individual owners to individually look or find a way to get their lost bitcoins back, and if they can't, then those bitcoins continues to stay lost forever.
4.45 million bitcoins is no small amount and if this number continues to stay unaccessible to its owners, then this will help the ones in circulation to worth slightly more in price.

Come to think of it, how do you expect the entire bitcoin community to collectively work together to retrieve lost bitcoins when the community doesnt own those bitcoins?, and when at the end of it, the owners of those bitcoins will claim their lost bitcoins and not give anything back to the community, I don't think it's worth the community's time and effort.
Those who lost their bitcoins by carelessly misplacing or forgetting their password should carefully find a way to retrieve their lost bitcoins.