The power of ignorance

If we were as ignorant of what goes in political circles, as country folk were in the Middle Ages, how could we tell which party was in power? Unless we had been pressed into military service, wouldn't we pretty much go on as usual from day to day? The papers rage about tax but most people haven't a clue how much they pay in income tax and NIC on their salary slips. Is it OK, rational, to be politically apathetic? Isn't personal action to improve one's life 100 times more important than who you vote for every 5 years?