GWH
Your MP is just being honest.
Gov.com's tend to collect Tax, this is just a nice easy one that gets poured into the Tax Bucket with little effort apart from just playing with the rate.
The rate is a bit of a joke, but if it were to be changed from cap city to a suitable formula, the overall rate/income/tax would tend to increase to pay for any changes and time spent on keeping people happy.
Lets just be happy it's so low at the moment, it's only going one way in the future !!!
GREEN ??????????