Single pot brakes is not really a big problem on the salt. 2 mile runout and parachutes allow time and distance to slow and stop. Remember that the air drag at speed will do a lot to slow the car just by getting out of the throttle and cutting fuel.
Liners and lakesters have very low CD so rely more on fuel cutoff and then the parachute. If you had road race or NASCAR brakes the low traction would allow the wheels to lock up.
Fuel and blown alcohol dragsters and funny cars do not have much for brakes, relying on their parachutes. They could install powerful brakes but that would add weight they do not want.
