DP and I are moving in together shortly. He has 4 DC aged 9-15 who come every weekend. Mine are 8.5 and 12 and live with me most of the time. We spend a lot of time together already and my DCs are already complaining that they don't receive as much pocket money as DP's do. What to do?
Background - His all get £5 a week from their mum, which I think is crazy - his 15 year old never has enough money (she's at a private school where I think a lot of the kids are given much more) - she wants to go out to the cinema, for food, to buy clothes, etc and is always skint. She says the boys she hangs out with (mostly a year older) pay for her a lot of the time, which worrys me a bit, but doesn't seem to bother DP.
But for the younger two (9 and 11) who don't yet have any independent social lives, £5 a week is way too much - they have savings piling up and the 9 year old was recently trying to pay is oldest sister £10 to tidy his room for him! Seems a crazy dynamic to set up with your children.
Meanwhile my youngest gets £5 a month - which mainly goes on sweets, and my 12 year old gets £10 a month - mainly on sweets and computer games. I often use fines, or threats of fines to encourage good behavour - and this works well, but there's no way it is going to work with DP's younger two who are rolling in money. (plus I'm not sure if I or DP can really fine them money that someone else gives them..)
According to DP, his ex says she gives the kids the same money because he pays her the same for each child 
He says there's nothing he can do about it despite the crazy family dynamics it creates. He tries to help his eldest out a bit by paying her to babysit, but this does nothing to reduce the huge savings of the younger two.
I want my kids to feel they're treated broadly equally to DP's but don't feel I can possibly copy such as stupid system of paying young kids money they don't need. What would you do?