It wont, because they will up the fare costing - Certain airlines are fighting the tax costings.
Depending on if the airline has hedges fuel costs you do see a lower fare, look at Norwegian airways, they didnt and are able to offer really low fares as the oil costs dropped.
Or you will see...
Or, you could just accept that sometimes planes are delayed, a lot of the time for safety reasons.
Who do you think will pay these fines?
Increase of airfare.