This is the most interesting Question and directly to the point. The answer is also very straight to the point.
The more the Demand. The higher the Pay. The more the Scarcity. The higher the Pay. The Demand and Supply Rules is applicable here as well.
Now the Question is how to get in to that role of in Higher Demand. To generate Higher demand, you need to select a Niche. Become Expert in what you do.
Example : I am Civil Engineer, Expert in Structural design. Helping, Supply chain Teams to Create stable structures of Warehouses. Very Specific. Very Targeted.
This is applicable to every field. Is it not that Simple. Yes it is Keep reading More Blogs.