Some people think nothing can be done about our original sin of building too close to the coast. They have an "oh-well" attitude and accept beachfill as a fact of life whether they like it or not.
Other people are visionaries. They see the future and they see value in protecting public resources for the lowest cost in the long run.
This is a great video about thinking ahead, working together, and preserving public resources at the lowest cost to taxpayers. Two things jump out at me about this video. They started in 1995! It took sixteen years to get to construction but it is doable. The other is that the engineered development (bike path) at the beach failed after three years.
More at http://surferspoint.org/ and venturariver.org Paul Jenkin, featured in the video, also waged a ten year battle to remove the Matilija Dam thereby freeing the sand that would naturally feed the beaches. So he not only gave the beaches "Room to Move", he is going to provide them with sand as well.