We have heard this quote "With Great Powers, comes Great Responsibility!" Why is it that a Salesmen only gets Great Responsibility but no Great Powers?

They have great powers the difference is that they don't realise it themselves.What more great powers would one need if you have the power to influence someone's decision making??????Maybe you are talking of great powers in terms of 'finances',but that is  asmall portion of the equation.They have what it takes and should start enjoying it NOW...

i believe a sales man has great powers.

if he is a successfull salesman he is empowered and powerfull. he can dectate tems with his company and his customers.

it is power.

untill sales man is working under some one he only takes orders so ANKUR when you will make your company and will sell your product you will remember this quote surely.