How do I get rid of low wealth demand in jobs?

Question

I have been working on a nice balance between demand and jobless citizens. When I look at my demand, I can see the companies in my city, only want low wealth workers. How do I remove this demand? I tried to destroy industrials which didn't look like high-tech. This seemed to work, but when I want to create new industrial for high-tech industrial, only low tech industrial will pop-up. I also tried the same with commercial and have the same effect (but then instead of tech, the demand of low wealth will increase and so does the demand of high wealth). I want the following effect: Decrease of low wealth demand. Increase of high wealth demand and little bit mid wealth demand. Can anyone tell me which factors I should look at and how I can make this possible?

This seems to happen:

Answer 1

The vast majority of commercial/industrial buildings want more low-paid grunts than medium-paid staff and high-paid executives. (For example, one building might want 140 low-wealth, 20 mid-wealth, and 12 high-wealth. A list is here; even the buildings that want more mid-wealth workers have pretty high demand for low-wealth as well.) If you want the demand to go away, you need more low-wealth residential areas.