The definition of reinforce is:
v.
1. make stronger
he reinforced the concrete
2. strengthen and support with rewards
Let's reinforce good behavior
---------------------------------------------------
People come together trying to lower the risks, not to make them stronger or strengthen and support with rewards. So "reinforce high stakes" sounds odd. Except "ight stakes" doesn't mean "high risks."
Context:
China and Japan remain miles apart on uninhabited isles
At MIT event, diplomats and scholars
reinforce high stakes, lack of progress on Asian territorial dispute.
More:
http://web.mit.edu/newsoffice/2013/china-japan-conflict-0417.html