It matters that the Twins get a lot of credit for unearthing players in Australia, Germany, and the Netherlands, but as of 2013, they've received about a cumulative ~1 WAR for these efforts.
And I think the fact that we didn't sign ANY notable international players, even from the hotbeds of the Caribbean and Central America, until 2007, and didn't really try to do so consistently until the international spending cap in 2012, is further evidence the Twins front office shies away from competitive bidding, even when the costs are relatively low. That has some ramifications on other area of the franchise too.
Our financial system is a lot different now than it was in 2007. The Twins drafted under slot in many of those years so I'm not sure we should be ripping Parks' conclusion based on things that happened 6 years ago (and we did sign some pretty good guys before that, including Wilson Ramos in 2004).
Additionally, what is the pay off you're looking for? The team scouted in Europe heavily enough to sign Van Mil who they traded for Fuentes to help the 2010 team down the stretch (not that Fuentes did much as he got hurt). If the Twins sign 20 kids from Australia how many have to make the majors? Would one - Thorpe - turing into a top 30 prospect make it worth it even if the other 19 never make it out of A+?
Do we ignore the impact of the international players that have had significant impact in the majors (and/or minors) that our front office traded for? Do we ignore the strong presence in Puerto Rico since that's part of the draft now? And lastly, our we really arguing (as you seem to be) that the Twins only signed ONE Miguel Sano and they should have signed more?
Your post reads like you're worried that Terry Ryan is getting some undeserved credit. Not sure if that's how you want it to read.