0/1/1 vs 1/0/1 and a 19 CS difference equals 650 Gold Bounty
Soo.. In GRF vs DWG, top lane match-up, Jayce has a 650g bounty despite not having a kill, having a death and the same number of assists as the enemy Viktor. So, 0/1/1 vs 1/0/1 (300 gold bonus from the kill alone) and a 19 CS lead at one point, providing a 650 gold bounty. Even if you put the average CS at 20g per CS, this is not even close to the amount of gold given by the bounty, much less the gold Viktor has for the kill (which gives no bounty).
So this is not a catch-up mechanic at all. This is a "you are farming better so we want you to be put behind by a ton when someone kills you" mechanic. It is not even slightly balanced and is ridiculous.