In the wake of institution of the draft why did some call the conflict 'a rich mans war but a poor mans fight'?

The phrase "a rich man's war but a poor man's fight" emerged during the draft as it highlighted the disparity in how socioeconomic status influenced participation in the conflict. Wealthy individuals could often evade military service through various means, such as paying for substitutes or securing deferments, while the less affluent had no such options and were compelled to enlist. This created a perception that the burdens of war disproportionately fell on the poor, fueling resentment and protests against the draft and the war itself.