But you want this accessibility to be restricted
Being able to generate interest with only purchasing 10 drk is a much lower barrier to entry than building a mining farm ..

Your desire is only based on greed, and it's not the good kind of greed (getting wealthy)... it's the bad sociopathic kind of greed ("Give me your stuff, you useless eater")
Consider the security gains. Is the fact the MN operators make more coin a reason to deny security gains for the coin?