Davy: I think that this is indeed one of those areas where the government should pull finger. It's not about compelling companies to adopt different pricing strategies - it's more about ensuring free trade so that you can purchase products legitimately from US or elsewhere. This freedom should be explicitly encouraged in the TPPA negotiations, so keep an eye out for what our politicians are doing, and don't let them get away with laziness.
That would be nice. Except that one of the aims of the TPPA is to specifically make Parallel Importing illegal. https://www.eff.org/issues/tpp