Well they would, wouldn't they? They had two pairs of songwriters in the band - busy at their respective typewriters: Graham Gouldman and Eric Stewart with their classic pop sensibilities had already put their songs into the Hit Parade with The Hollies, Herman's Hermits and The Mindbenders. Then you had the art school agitants - Lol Creme and Kevin Godley. Their slightly more cynical style and edgy lyrics were the perfect counterpoint to the luxurious sounds coming from across the corridor. Put the two together, throw in a little rudimentary studio trickery and, voilà, the unmistakable 10cc sound.
Silly Love was one of their few flops - if only getting to # 22 can be considered a flop - and shows that when push came to shove they could roll up their sleeves and get stuck in; or indeed any other cliché you may want to insert into that last sentence. I wasn't aware of this until I found the clip below, but in true 70s style they deployed two drummers when in a live situation.