Just my 2 cents here :
I live in the Netherlands with my daughter. When we first moved, her dad still lived in SA although he has since moved to Australia. He continues to pay a monthly amount like clockwork. I have never had to ask for an annual increase (I believe it's linked to inflation although I cant say for certain how he calculates it - for me its not that important) nor has he ever skipped a payment. I seem to recall that we just converted the Rand amount into Euros and thats what he continues to pay (it balanced out because despite the exchange rate and cost of living difference, we have fewer expenses here vs SA for minimooks because we dont pay for schooling or health care).
He didnt see her for a few years when she was too little to travel on her own, and when neither he nor I could travel for work or financial reasons. She now travels as an unaccompanied minor to visit him once a year since the age of 7.
Despite all the financial restrictions and logistics, he accepts his moral and parental obligation to contribute to his childs welfare and upbringing. IMO, thats a good father who loves his kid and doesnt let borders dictate otherwise. You want to be like him.
(p.s. he's not my cup of tea in many many other ways, just as I am not his, but he is a good dad - cant fault him there!).
p.p.s. Minimooks is now almost 13yrs old and misses her Dad, skypes with him once a week and whatsapps with him frequently. Borders and distance have not robbed them of a relationship, even though the one they have is not the one they would have chosen for themselves.