Very nice post!

people will be able to live with 600€ pretty well

I agree with this. However, I think some kind of basic income is not a bad idea for people who earn less than those 600€ / month, or can't earn anything at all.

If you're right (and I think you are) this basic income could became lower and lower, when technological progress will cut costs and final price tags even more.

It's true many services are cheaper and cheaper (especially in freer markets), but houses, for example, are still too expensive for many people, now. Until free house with ads : )