Who deserves the high pay - White Collar Job or Blue Collar Job?

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During my childhood days, I always admire those people who were tasks to do some infrastructure on the road. Especially those who assigned to built bridges and roads because without these maybe we find it difficult to go from one place to another. Those people who were known as labourers. The labourers who also called as the blue collar employees. Aside from admiring them, I always say to myself that they are so genius enough because they know how to read the guide, drawings and the procedure how to build those bridges. Maybe without them and their knowledge, bridges somehow cannot be build accordingly. In addition, I also admire those who did the layout of the drawings for those bridges. Their creatitve minds thought of it and drawn before it was handed down for construction. Maybe if they did not pursue to lay down the drawings and ideas for these bridges, somehow these infrastructure cannot be build and no drawings can be follow on the construction. However, thoughts passes to my mind, who should have the high paid job - like in this - the one who did the layout of the drawings or those who put it into construction that does the actual work and action?