In Febrary 2015 in the Guardian, Greek Finance Minister Yanis Varoufakis wrote "How I became an erratic Marxist". The gist is that he's working with European capitalism because
"Europe’s crisis is far less likely to give birth to a better alternative to capitalism than it is to unleash dangerously regressive forces that have the capacity to cause a humanitarian bloodbath."
In the above Guardian article, he also mentions that he found out later that his Sydney appointment was aimed at keeping out a left-wing candidate - which I find quite ironic, but the best of outcomes.
This article is based on his 2013 address (before his entry to parliament) to the 6th Subversive Festival in Zagreb,Croatia: "Confessions of an erratic Marxist". He argues that "Marx must remain central to our analysis of capitalism" but that at this point [then and now], it is necessary "to stabilise capitalism; to save European capitalism from itself". You can watch the address here, or read his intermediate version of this article on his blog here. You can read a more mainstream Marxist response to this ("poppycock") on a blog post from one Michael Roberts, More Erratic than Marxist, which has some debate on the issue afterwards.
(For what it's worth, the Yanis I remember looked more like this: