Yes it certainly is unfair.
65k x 12 = 780k. There is a Old Person's 190k allowance, plus 60k = 250k.
Then the first 150k is at 0% tax, and then 150 - 300k at 5%.
So you are liable for 5% on 300k plus 10% on 80k. Total tax = 15k + 8k = 23k for the year.
Figures given to me by my local Tax Inspector. Got it in writing.