I think it's a mondegreen!
Compare these:

Our version:

The gentry in his fine array, do prosper night and morn,
While we unto the fields must go to plough and sow the corn.
The rich may steal the power, but the glory's ours alone,
When we go rollin' home,.......

Sapper82's version:

The rich man in his fine array, do rest and take his ease,
Whilst we, poor humble labourers do plough and sow the fields;
Why do we live in slavery, lest each reap what he sows,
And we'll go rolling home,.......

or is it this line?

While we poor weary labourers strike through the sleet and snow.

No wonder you can't make sense of it.
Robyn