nah its not necessary, it would eventually reach equilibrium.

so like if you started at 10000, and lost 5K to the reverse auction, the numbers would look like

10000 -5k carried over
15000 - 7.5k carried over
17500 -- 8750 carried over
18750 -- 9375 carried over
19375 -- 19687 carried over.

it would approach 20K but i think never quite get there.

(because KISS matters so much to these people)

KISS is a dumb idea. Some problems just don't lend themselves to simple solutions.