I don't see how adjusting the pressure will help. If the pressure is too low, the steering wheel gets very hard to turn and just slows down the rate of rotation of the wheels. When you turn the steering shaft, you can see the shaft move in and out of the steering box. This movement slides the spool valve for and aft, and sends fluid to the appropriate side of the power piston. The pivot lever connects the steering column to the spool valve, and looks like a steel clothes pin. The reaction springs (I'm sure you've heard of them) are what control the "firmness" of the box, and resist the movement of the pivot lever, and that is the force that is translated to the steering wheel that you feel.
I haven't experimented with it, but some of the pumps have an adjustment screw on them for the pressure. Maybe adjusting it would do something beneficial. There are different pressure specs for different car bodies.