Why can't I use Paypal for iTunes in The Netherlands?

For some time now I have been trying to complete my account so I can finally make purchases from the iTunes store. Today I tried again hoping that there would finally be a payment option besides credit cards. I was delighted to see the paypal option. I went through all the steps but eventually got an error message saying that iTunes needs a US based paypal account. Turns out I was in the US iTunes store when I tried to create my account. When I switched to the Dutch store there was no paypal option, only credit cards. Why the H can't I use paypal in the Dutch iTunes store when US citizens can choose PP? And if the PP option is in the works for The Netherlands, when will it be available?