Humanity has to change how we solve disputes every so often to avoid people gaming it

I think a big problem we face in humanity is how we settle our disputes and it's a large function of a government. But, after enough time people figure out the "rules" and get their own refs or figure out loopholes.

Fight to the death? Well not my death, i have a guy to fight for me.Courtrooms? Got my friend to be the judge. Arbitration? I have the money and you have the issue so let me hire a guy to hear you out and ignore it.

It seems that we need to change how we solve disputes like every 120 years before it gets overwhelming and the old system stops working entirely.