It is skinny, agreed. But this is basing things in the present. £155 pw is now, so it's value decreases through time, if I'm understanding it correctly?
Just checked (thanks for link happypig), and in the unlikely event I make 67, I'll receive £155.65 per week as of May, 2035.
It does state it does not include any increase due to inflation. So, assuming I'm reading it correctly, in 19 years time that will be err...not a lot!!! [emoji53]