I would imagine that in the US clinics treat anyone who is able to fork over the cash.

Whether Brad & Angelina did in fact use IVF is irrelevant, I don't see the harm in discussing it as a hypothetical.

I don't find it insulting that a fertile couple would choose to go through IVF unnecessarily (although I do wonder at anyone who perceives it as a 'convenience'), although I do believe that they should either pay a premium to allow more resources to be allocated to genuine needs cases, or not receive any Medicare rebates and under no circumstances be given priority treatment over those in need.

I don't see it as an ethical issue in the same way the concept of 'designer babies', as having two babies at once by choice seems vastly different to the future implications of either modifying or rejecting genetic material to enhance 'desirable' traits or remove perceived 'undesirable' traits.

However, I have not been down the IVF path so my perspective might be completely different to those who have.