rpietila, I am very surprised that you are not invested in NXT. Between the java platform, proof of stake done correctly and decentralized exchange it is definitely a value adding block chain.
The bigger the idle stake, the bigger your interest in keeping the system working and you can act upon this by simply holding on to your stake. With bitcoin, miners for example have a big say on the state of the system even if they hold no btc. In NXT, on the other hand, the only entities with a significant say in the state of the system are the ones holding actual stakes in the system.