you being a socialist, of course you come up with these bizarre conclusions that disadvantage the masses.
the ideal situation would be that there is NO LIMIT.
The Socialist is the one who tells us we can have everything we want for free. How has that worked out for Western civilization with socialism peaking every where with the sovereign debt collapses imminent with $200+ trillion of global debt.
some of the spam going on now is trying to use 0 fee, which is filtered by just about all miners.
And you want an unlimited block size

Now let's say I like to attack the network and I pay someone with a lot of hashrate to flood the network with blocks of unlimited size with 0 fee txns.
It is sorely obvious that you have inadequate skills in computer science and game theory.