Everybody is giving you good answers. It is not a volume problem. If the water level is low enough and/or the pressure switch is adjusted too high, the pump may not be able to reach that pressure and will be destroyed from deadheading.
If the water level is high and the pump can build lots of pressure, blocking off the pressure relief could send your tank through the roof like a rocket.
And it doesn't use more electricity to produce higher pressure, unless you install a larger HP pump to do so. As a matter of fact, the higher the pressure the less the amp draw will be. It is counter-intuitive. The higher the pressure, the lower the volume, and the lower the amp draw.
Let us know the pump model number and the depth to water in the well and we can tell you how high you can turn up the pressure switch.
You never said what you are trying to accomplish, but I am guessing you want better pressure in the house. You don’t usually have to increase the pressure switch setting to get higher pressure in the house. Even if you increase from 30/50 to 40/60, the pressure will still be at 40 PSI a lot of the time, which is why the pressure seems low. If you hold the pressure at a constant 50 PSI, it will seem like you greatly increased the pressure setting. A constant 50 PSI is much stronger in the shower than an average 50 PSI that happens when the pump is continually cycling on and off between 40 and 60.