Whose failure to limit? We are a republic. We elect people to do that for us. In terms of the judiciary, we either elect them at the lower levels or they are appointed by the people we elect. We are now back to the fact that the people we elect, almost by definition, are interested in power. So how do you go about limiting the power of the government? Short of armed rebellion, that is.
I think the FFs actually came up with a rather elegant solution to this. By having three branches, they spend so much time attempting to gain power over each other they have limited time to gain power over us. But it is not a perfect system.
Ultimately, it depends on the voters. When they no longer understand the value in limiting their own power, or the power of government acting on their behalf, constitutional limits are moot. This was the inherent weakness Franklin was pointing with his pithy quote about people "voting themselves money".