The median of +3% and -3% is 0%. So overall, for economy to be healthy, they need to go up by 3% but then must eventually come back down by 3% in order to equalise to a healthy 0%.
So if someone trades 50 of his oranges for 100 apples today, then tomorrow he must give up 100 of his oranges for 50 apples in order to balance the unfair trading into a fair trade.
We really need to fix up our economy or we will end up 2nd poorest country in the world, I believe USA is currently poorest country in the world. Unfortunately Rishi Sunak only follows the USA's orders so sadly we are all doomed and simply following the USA in getting poorer by the day.