Just keep the blocksize the same.
Bitcoin's job is to store value, not to be the next Visa. It *should* be expensive to move around.
Explain.
We tend to couple in our minds the processes of "clearing a trade" and "making payment".
That's because they are one and the same. Whatever happens behind the scenes is none of the average person's business.
They are not one and the same, not even remotely.
Thats one of the reasons this debate gets do confused, because people are clueless as to what the mechanics of a commercial trading network really are and are therefore ill equipped to prioritise the most appropriate properties that bitcoin should have. They think "store of value", "payment system", "commercial trade transaction", "monetary asset"...it's all the same thing.
Well, they are not all the same thing and can't be supported by a single monetary medium.