What age would you start Pocket Money?

[sahara]

Hi everyone. I was thinking about introducing a £5 a week pocket money for my ds1 (6yrs).
Only because I need a new way to punish him as taking the ps2, his toys, days out, internet access, treats blah, blah, blah, have all stopped getting posistive results.
What do you guys think?
Oh and any fresh ideas for discipline would be recieaved gratefully.

DS1 (13 next month) and DS2 (11.5) both get £4 a week.

I think £5 for a six year old is a lot !