Pitchfork contributor Saby Reyes-Kulkarni likens Sleaford Mods to the late Wesley Willis (rock over London, rock on Chicago). Her stated primary difference being that you shouldn't laugh at Willis, because "mental illness tinged his music with uncomfortable hints of exploitation, where you can laugh at the Mods guilt-free". I imagine Williamson -- and Karl Marx, too -- would disagree with Reyes-Kulkarni on the matter of exploitation being isolated to Willis.
So, before slagging-off the Mods like a misinformed classist wanker, give this a listen. 8/10.