The Hoops boss accused the Moroccan of being unprofessional and raised concerns over his fitness.
Taarabt has since hit back at Redknapp's comments, but Lomas believes that the 25-year-old deserves little sympathy.
"If he is on £60,000 to £70,000 per week and he ain't putting it in, he deserves to be exposed.
"Where QPR are at the minute, they need committed players. Taarabt is a talent, but Harry Redknapp is not the first manager to be frustrated with him and Adel needs to have a look at himself."
Taarabt has made just three appearances for QPR this season.