What SheldonCRules said : As long as it's not about debt and the person has paid their bills, what they spend their salary on after that is down to them.
This - precisely. If someone wants to send 1k, 2k, whatever, and can afford it, it is no one else's business!!
My 2 will be 19 & 16.5 by xmas, they have definitely got more expensive as they got older, but then we are more comfortable financially and can afford more, as well as securing both ours and their future with ISAs and pensions.
However, we don't spoil them and have definitely never bought them anything to keep up with other kids. DS got his first iPhone last year, as a joint 18th/xmas present and pays his SIM only contract himself.
DD's contract is up for renewal so she is looking at a cheaper iPhone, with us still paying contract until she gets weekend work.
Not sure what DS will get, he is at uni so doesnt want much, we may look at a basic electronic keyboard he can use in halls (with headphones!!) as he plays a piano at home and is def missing playing it (has found an out of tune one he can play somewhere on campus). I think it helps him relax.
But, back to SheldonCRules point. When DS passed his driving test, we bought him a small run-around, he paid insurance out of his part time wages. The car was as much for our benefit - he was working 10miles away with poor public transport, so we were driving him there and back at weekends, whilst looking after my sick mum 70miles away. It put a lot of strain on us, as DH and I couldn't both go to support mum at weekends, so buying him a car was a no brainer. He knows if he wants it long term, he has to buy it off us, otherwise it will be used by DD when she learns next summer.
However, a friend expressed disgust when she found out that we bought him a car. Absolute disgust!!! I was astonished, esp as she has spent most of her considerable earnings paying for private primary to ensure her DDs got into a top grammar. I couldn't (and still can't) understand why it is OK for her to spend her spare cash in whatever way she pleases to benefit her kids, but not so for me & DH! We could afford it, it helped us if he had a car, so what on earth was my friend disgusted at?? I did try to ask, but didnt get a response!!