Note that it's already more than 4x more expensive to use this method of data publication:

* it doesn't get the 4x witness discount

* there can only be 1000 bare multisig outputs in a block, which the Bitcoin Core mining algorithm handles by treating each sigop as if it's 20 bytes

You could maybe encourage miners to bump -bytesperblock to 50, but there's no perfect number there. Finding the economically optimal block given two constraints is very hard.