I still say its an issue because there is no work being done by those problem hoarders.
...
they dont care. Thats quite apparent from their lack of action over bitcoin's decline.
Bitcoin declining? Au contraire - it's still growing nicely at a pretty steady 50 BTC every 10 minutes

Seriously though, there's absolutely no way you can back up this statement - you don't know what Satoshi or any other "hoarder" does for Bitcoin.
The more BTC one has, the higher his/her incentive to help Bitcoin succeed. Apart from this natural tendency there's nothing you can do really to force people to contribute or determine what they have to do with their money.