Would you care to point out anything from that article that backs up your assertion? Because while saying that medical professionals in America are commonly engaging in ligitation avoidance tactics by arranging referrals that are unlikely to be necessary and this would logically increase the cost of healthcare in America is a reasonably logical assertion, this article does not provide any basis for the assertion you made. European healthcare institutions are not even mentioned in this article, let alone any cost analysis comparisons, so how on earth did you think it provided sufficient base for your assertion? The article even says that similar behaviour was noted in a Japanese study.
For example, the Labour government in the UK changed the system by which the NHS trusts were being judged to provide good performance to a system which favoured making excessive referrals. Guess what happened? More referrals, more unnecessary scans, etc. For me to then claim that the change in policy is the cause of the spikes in the UK's graph line would be similarly without base.