Assuming appropriate market mechanisms are allowed to work "properly," technology just changes the nature of jobs, and the relative pay scales between different kinds of jobs. So it is probably somewhat accurate to attribute some of the growing wealth inequality on technological innovation (heck back when most of the human species made about the same - just enough to keep barely alive and reproduce), but not the lack of jobs.
The problem as I see it, and I could just lack the imagination to fill in the gaps, is that technology would progress enough that there would be automatons that are intelligent enough to do just about any manual labour or service jobs (hell, even jobs that require creativity and other higher thinking). In such a situation, "appropriate market mechanisms" could utterly fail to make new kinds of jobs as the capabilities of many people would become completely worthless and disposable. Like I said, perhaps I just lack the imagination to foresee how we'd stay relevant. Humans are, after all, very adept at finding ways to make a buck or do something differently. Two hundred years ago I'm sure doom and gloom would have been being preached after a soothsayer gazed, seeing our present, in her crystal ball. Yet, here we are, and we're doing pretty alright.
To your second point - of course technology has a huge role in the lack of jobs at the moment. Just the internet has destroyed millions of jobs that used to be common as its influence rippled through society. It has created millions of jobs as well, obviously, but I don't think it evened out.
In some parts of the world even basic technological advances that are commonplace are shunned due to pressure from workers who don't want to lose their simple jobs. For example, companies have workers unload entire trucks by passing goods from one person to the next instead of simply buying a forklift. I'm not saying that Americans should do this, merely driving home that technological innovation has, is, and will play a huge role in unemployment. It's not at the root, of course. The root is always money. When it becomes cheaper to automate a process, technology displaces workers. But full employment could be acheived if many technologies disappeared overnight. Most people would be underemployed, sure, but employed nevertheless.