Not to be an ass, but it's spelled brakes. Most people would not want their brakes to "break".
Also, the lifespan of brakes really depends on your driving style and conditions.
If you live on a mountain and/or are an aggressive driver (accelerate and brake quickly) then your brakes will wear out faster and you will be replacing your brake pads and rotors more frequently. If you live in a rural area or even the suburbs with mostly highways and little traffic, your brake pads will last much longer.
Brakes are similar to clutch discs and that driving style is the key factor to their longevity. They both eventually wear out and are designed to be replaced. Aggressive driving simply results is these components lasting a shorter amount of time. My Kizashi only has 15,000 miles on it so my brakes are still good.