There is no ensured Quality of service, is there? If you "bid" higher, then you don't know what you are going to get. Also because you have no way of knowing what others are bidding. Only if you have auctions (increasing increments) you can establish a feedback loop to settle demand and supply. And the supply side doesn't adapt. Adapting supply would help resolve parts of the capacity problem.

On Sat, Jun 27, 2015 at 7:37 PM, Peter Todd <pete@petertodd.org> wrote:
On Sat, Jun 27, 2015 at 07:26:00PM +0200, Benjamin wrote:
> "Thus we have a fixed capacity system where access is mediated by supply
> and demand transaction fees."
>
> There is no supply and demand. That would mean users would be able to adapt
> fees and get different quality of service depending on current capacity.
> For example if peak load is 10x average load, then at those times fees
> would be higher and users would delay transactions to smooth out demand.

That's exactly how Bitcoin works already. See my article on how
transaction fees work for more details:

https://gist.github.com/petertodd/8e87c782bdf342ef18fb

--
'peter'[:-1]@petertodd.org
0000000000000000007fc13ce02072d9cb2a6d51fae41fefcde7b3b283803d24