Not "folk" by any conventional definition but a song written and sung by yer actual working class working workers with jobs, 'Working' by Cock Sparrer is a nice cheeky thumb in the eye to the system

I been working all day for me mate on the site
Running around like a blue arsed fly
I been working
And I been working all day for me mate

Every bleeding minute I been on the go
Up and down the ladder like a fiddler's elbow
I been working
I been working all day for me mate

[Chorus]
Wait for tomorrow at half past ten
When I sign on, but until then
I'll be working
I'll be working all day for me mate

Aint' got no cards, don't pay no tax
For a score in me hand I'll be breaking me back
I been working
And I been working all day for me mate
Call me a crook, call me bent
But I need more than food and rent
I been working
And I been working all day for me mate

[Chorus]

They try to follow me every day
I give 'em the slip and I'm on my way
None of the other blokes thinks it's wrong
'Coz every one of 'em's signing on

[Chorus]

They try to follow me every day
I give 'em the slip and I'm on my way
None of the other blokes thinks it's wrong
'Coz every one of 'em's signing on

[Chorus]

The benefit boys are out of touch
What they don't know won't hurt 'em much
I been working
And I been working all day for me mate

If I'm caught I'll go down for a month or three
But they'll still be paying out looking after me
I been working
And I been working all day for me mate

[Chorus]