But about fees & spam: Miners, according to "rational self-interest" argument, are sufficiently incentivized by "thou shalt not shit where thee sleepeth" commandment. They should not debase bitcoin by bloating the blockchain, thus devaluing their rewards. Caveat: They sell BTC for USD -- their wealth is not in BTC, so that's why.
So pushing for min fees brings attention to some serious shit, so not to be done.