@Lash,
The US/UK leftist awakening is a good thing, me think. I don't know much about Corbyn but am a huge fan of Sanders. The "third way" of Bill Clinton and Tony Blair was probably a good idea at the time (and Macron is in essence playing catch-up to that third way in France right now). Yet this middle of the road way between the interests of the working class and those of the capitalists (to simplify), that middle road progressively turned right, as rich folks and corporate lobbies tended to be more powerful and influencial than labor unions & salaried folks generally.
So IMO, at this point in time the US Dems need to turn left in order to get nearer to the working class/poor folks, from whom they've become estranged over the years. The French left, on the contrary, needs to repair its ties with corporations and business owners, from whom it has become estranged over the years.... (scratch that: decades) which has led to persistent mass unemployment in France.
As a result, and even if the detail of Macron's and Sanders' policy prescriptions vary, the main thrust of Macron's economic policy tries to achieve the same balance between the diverging interests of corporations and people as Sanders is trying to strike, i.e. a form of "tamed capitalism" respectful of the greater good while still profitable enough to create jobs.