In the following poem, which does “come to dust” symbolize?

fear no more the heat o’ the sun
nor the furious winter's rages
thou thy worldly task hast done
home art gone, and ta’en they wages
golden lads and girls all must
as chimney-sweepers, come to dust

Base on your question that states a poem that ask what is the term "come to dust" symbolizes. I think the authors purpose and the way it was use is the poem it symbolize the effort has done by the chimney - sweeper is just taking for granted or it is not accredited at all because the snow from the chimney is now melted because of the sun