For a given amount of power transmitted, you want the lowest dissiapated power through a resistance. This can be achieved through transmitting at the highest voltage and lowest current. But to be at a high voltage implies a high current. The are directly correlated. So if one was to create a high voltage but make low current flow then one has to do work to 'slow' the current flow? This translates to wasted power? But that is not taken into account in textbooks. Why? Is my concept wrong? i.e P=iV P lost = i^2R If for the second time, one transmitted current at i/2 and at a higher potential of 2V then the power lost is 1/4 less but the power delivered is still the same. But for me work needs to be done to reduce the current follow because voltage has doubled. The charges 'want' to move more in the second case but you are not letting it. Why isn't this extra work taken into account or is my thinking wrong?