The whole point of 1984 is to show how perfect surveillance allows the perfect enforcement of unjust laws, allowing complete control of Big Brother over every aspect of the lives of the country's citizens. The same cameras that can be used to fine you for illegally crossing the street can be used to find and punish you for illegally speaking out against the regime.

This is the danger of surveillance tech: you install it for purportedly good reasons, but once the power to monitor everyone to this level exists, it becomes very easy to start pushing towards more control, both legally and illegally.