It would be nice if it could be done just through the network (some kind of proxy staking) somehow, again to avoid giving someone *control* (not ownership) over your clams.
I've looked at doing something like that in the past, but came to the conclusion that it's probably not a good idea. If there was some way of giving "staking rights" to a third party without also giving "spending rights", then more people would feel comfortable signing away their staking rights. That would lead to bigger staking pools. Currently JD doesn't have much competition, because it is the most trusted, and so even though smooth's pool is free, people would rather pay the 10% for "a name they can trust". If you didn't need to trust smooth, everyone would stake with him, and he'd be able to 51% the network. I think it's best for that reason not to separate "staking rights" from "spending rights", to force people to think seriously about who they trust to stake their coin.
Nxt allows leasing balance for forging and their network is running fine, at least far more decentralized than CLAM. This is something that CLAM should also implement.
Now if people withdraw from JD, most will just go directly to exchanges because staking on their own wallets is a waste of time. If leasing balance for staking becomes an option, it will also encourage people to move their coins off the exchanges.