The most important aspect of the current Corbyn-Hype IMO is the fact that for the first time in decades actually Thatcher-ite dogma's appear to be questioned on a larger scale. This is important beyond the UK, bc Thatcher/Reagan together shaped large chunks of politics all over the Western states that are still in effect. Favoring the financial sector (well, not really "favoring", but shaping the political sphere to serve exactly one purpose - to have the financial sector benefit from it). Call it "austerity", call it "neoliberalism".
Music critic for the Tally Ho