How stupid is the Inland Revenue and the media?

In the press today the Inland Revenue has undercharged 6 million people and overcharged 4mio.
Then they say that the net effect is only STG 200 million.
No wonder they are useless.

If 6 million people owe the Inland Revenue STG 1400 each on average
And 4 million people will received STG 400 each on average to me
that equates to STG 6 billion in the bank!!

1. they make a huge mistake
2. no one has any recourse when they want it back
3. their computers systems are completely useless
4. their I.T. didn't check the calculations correctly.
5. average I.T. pay is about STG 17k
6. pay peanuts you get monkeys!!!

If this was a corporate they would not be able to get their money back if it was their mistake so why does the tax man???