I just talked to gmaxwell about this.

He said something like: you can specify relative lock time in a transaction.  So lets say you make a transaction where it can't be included in the block until 10,000 blocks after its newest input.

Then you increment the transaction's sequence number and change the lock to 9,000 and say adjust the amount sent.
Then you ** 8,000 and adjust the amount sent again.
Then you ** 7,000 **.

Block candidate producers (miners) would then be very likely to include the first available transaction that becomes unlocked... so that a particular block producer can gain the benefit of the tx fee instead of some other producer say 1000 blocks from now w/ the previous sequence number.  Also, in general, entities prefer attaining ownership of more durable money/resources earlier rather than later, all else being equal.

With Child Pays For Parent, or other methods, even the recipient could motivate miners to include the transaction with the shortest lock time.

Such an explanation satisfied all of my questions.  Do you need more or are you now satisfied too?

Cheers,
Praxeology