I'm not sure I get.
If you don't need the block chain, maybe you don't need bitcoin in the first place.
The block chain secures the network. But it doesn't HAVE to be used to trade, it's merely the main frame. If you enforce rules on the block chain that people regard as unfair, they will naturally stray away from it, using escrows or key swapping to trade instead, and that will reduce the traffic on the block chain, thus reducing miners' fee, and reducing the security overall. As it stands, use of the block chain is voluntary, so you can't go around pushing rules on it.
Maybe I should say that discourages trade instead of transactions. If you buy 100 cofees for 20 btc you're trading more than if you buy just one.
You miss the point. Right now whether I pay .20 BTC or 20 BTC, I'm paying the same fee. Fee is based on transaction size, not volume. What is charged is the amount of data that needs to be added to the block chain for the transaction to take place. That is of course logic. But if you feel you need to modulate fees based on another criteria than block chain load because the payout is too low, then I say let things settle naturally and watch miners charge fees based on volume too.
My point still stands, flat fees always hurt small trades. Once again that will push people towards escrows, who will offer cheaper transfers while not paying a cent to the miners.
The point is that your proposal doesn't take time into account. If you buy one coffe with a 0.20 btc you just have recently acquired you will pay the same fees as another one that uses 0.20 btc that aquired a year ago.
I do not think time of entry is a legitimate cause for higher fees. You people are presenting hoarders as some sort of free loaders on the economy that only take and don't give anything in return... The network has grown to what it is thanks to long time holders. Not thanks to miners, not thanks to speculators, but thanks to long time investors alone, who took a chance and invested into Bitcoins. You are offering to chastise these people for the very action that bears the economy.
As creighto points out, storing "older coins" is more expensive for the network than storing "newer coins". Why only traders have so pay for storing everybody's account?
Feel free to do so. If you can trade keys off network you are not a burden to the network, and someone is going to pay the demurrage fee eventually for them and you.
Maybe you should take a little more time in reading the people you refer to. Traders are the ones making the block chain heavier, certainly not hoarders.
Nevertheless, the whole idea that hoarders just sit on their money and NEVER participate in the economy is preposterous.