in england on the other hand, a PhD alone, i agree, is not so good. but if you get a FUNDED PhD then you will get about 13000£/year, tax free. i think that is more than 900€/month minus taxes. and further, you well get this money not for doing any kind of 'work' for others, but exclusively for doing your own project, which means it is very possible to be finished in 3-4 years. there is of course also a disadvantage in that you don't get involved with many other projects and will thus acquire a more narrow expertise.
so the systems are different, and both have their advantages and disadvantages.