You claim that the mining of XRP leads to wasted energy and resources but wasting energy and resources is a requirement of the Ripple system to prevent spam! If in the future the acquisition of XRPs does not require an expenditure of energy or resources, then it cannot function to prevent spam.
I completely disagree. So long as the supply is limited, XRP can prevent spam, even if they are given away for free. The waste you are advocating is entirely needless. There is simply no need for anyone to ever waste anything to acquire them. You are arguing for huge amounts of wealth to be destroyed and power to be wasted for absolutely no reason whatsoever.