Hard work vs. Head work

Your leathery hands
With hairs like a wolf's
And nails disfigured
Remind me of a figure
Like the dew of the morning
Is the sweat on your body
With a thick repelling perfume
Of salt water and fumes
Day in day out
Is your hustle and bustle
Your huddle and muddle
Aluta continua
Some sit on seats pressing keys
While the surly sun kisses your bald
They work with their heads
You work with your hands
And they spend not as much your brawn
They live in big mansions
You live in big cartons
'Cause you've spent not as much their brain