Hehehe, in the actual Robin Hood legend, it's Richards brother John who is over taxing people and whom Robin Hood robs, not Richard. Richard is seen as the true King and when he returns from fighting abroad, he pardons Robin for his crimes.
But I like that your game gets it wrong, it makes it seem more like an old Japanese game that would mix up the names like that.
Also, in reality, John wasn't a bad King and the Robin Hood view of him and his reign are really unfair. Really, Richard was the worse King even though he was "heroic" always fighting wars. He bankrupted the kingdom with his constant campaigns to take over Normandy (where he was actually from). That's why John had to tax the country so much after he took over.