Stress-related conitive bias leads to optimistic decisions

A very intriguing piece of research which has important ramifications for governance at all levels and in all sectors if it is considered robust. See here for the fuller report: Stress changes how people make decisions:

"Stress seems to help people learn from positive feedback and impairs their learning from negative feedback," ... This means when people under stress are making a difficult decision, they may pay more attention to the upsides of the alternatives they're considering and less to the downsides.

Just transfer that dynamic to Tony Blair (or whover) deciding whether to send troops to uncover WMDs or to remove a nasty dictator...
How should this affect the way we do governance? I think we needdecision-makers who are less stressed or checks and balances to offset their stress-related conitive bias.