Lord Bamber
Legendary Chairman
Does the financial reward not perhaps hinder attempts to get close to two hours though?
I remember when Sergey Bubka was the undisputed king of the pole vault world back in, what, the late 1980s and early 1990s. He was so supreme, he won almost every time.
When he competed at (non Olympic) meetings, the sponsors used to offer athletes substantial financial rewards for breaking world records, but they got paid exactly the same whether they smashed it by miles, or nudged it forward by a few millimetres. So it was in Bubka's interests to only go, say, one centimetre higher each time. He was easily capable of going ten, twenty centimetres higher in one go, but he wanted (understandably, as a Soviet athlete) to get paid regular wads of cash. Ten times fifty thousand is a lot easier on the bank account than one.
So perhaps the marathon runners are conscious of that too? Maybe someone could go three seconds faster in one go, or maybe he'd rather reap the rewards of running one second faster three times.
(I have no idea if that's the case with runners, but I know Bubka admitted to doing it).
An excellent point in any event where the world record is not such a ground breaking feat or, like Bubka and others, its easy to rake in sponsors cash by breaking the record slightly each time. The difference with sub 2hr marathon is the individual will be so handsomely rewarded after breaking it, it makes up for taking small chunks off on the way.
Plus, how gutted would say runner A be if they took the world record down three times in a year, and made a lot of cash and then Runner B came along and nailed the 1st sub 2hr making oodles of cash and writing their name in history something which Runner A was capable of anyway but chose not too do.