How are Doctors,Engineers,Teachers,A tailor are an asset to the economy of a country ?

1)

•  Doctors help to keep the humans fit so that they can prove to be potential resource.
• An engineer builds all the necessary infrastructure for that is essential for carrying on the works of the economy smoothly. We  cannot imagine  a nation to be progressive without proper transport network and buildings.
• A teacher gives education to all so that we can become good citizens with adequate knowledge to drive the country towards progress.
• A tailor stitches clothes and this helps us to groom our selves and present ourselves better before others.