This demolishes the ego & arrogance, inculcates dignity of labour, imbibes sensitivity to environment, freedom from public opinion and inspires others. The broom & its use in public do wonders. It humbles & humanizes the mind, instills a sense of ownership & being responsible. It enhances confidence & courage.

"If there is a problem and no solution possible, then it is not a problem. If there is a problem & a solution is possible, then also it is not a problem."

-Dalai Lama

In both the cases you are the problem. This is what SCMLD makes the students realise and imbibe: manage & change oneself and do what one can/wants to rather than grumbling, accusing, excusing or escaping.