What you have just described is a system to funnel money from all users into CoinHunters personal wallet. Why should people get richer just because they are already rich? It might be the way of the corrupt high street banks but it's not the way of the peer2peer crypto-currency system that was designed to replace them.
then you are not up-to-date, we are discussing the point on SolidCoinTalk that the biggest account (CPF - CoinProtectionFund) will give his account-fee-income to charity, global organizations with good reputation like UNICEF
If you are not going to use the interest, don't collect it. The founders promise to donate it to charity? Like they promised SoiledCoin 1 was better than Bitcoin? And how they promised SoiledCoin 2 is better than Bitcoin? And now they promise SoiledCoin 3 is better than Bitcoin AND going to give to charity?
How about they first make a block chain that works, then they can donate money to charity.
This mechanism doesn't clean anything and isn't spam protection. It solves a problem that never existed and in the process ensures those with many coins get snowballing wealth, as well as losing the semi-anonymous nature of BitCoin.
when we just think of someone who doesn't like SC/MC very much, now with SC he can create hundreds of different clients/accounts with a little amount and this blows up the whole network with dispensable transactions and "dead" accounts...
yes, he has payed transactions-fees or he has only mined one SC-block, but these accounts will be there "for ever"
now he will do the same to MC...
hm... after a few days this mini-accounts have gone away and the fine MC$ of the spammer are back redistributed to the network and he does something commendable too: a part of his money goes for charity

for me that looks like fine spam-protection
Edit: in the past there have been some problems with spamming - regarding SC - and LTC too (blowing up blockchain)!
You have no way to differentiate small users from people who are up to mischief. So it just boils down to money being siphoned form everyone who is not a founder and put into the pockets of people who are founders. Classic pyramid scheme outcome.