While the 24-year-old is likely to be the subject of interest once again this summer, McCarthy has urged Reds boss Jurgen Klopp to keep hold of Wilson next season.
"Why could he not go back to Liverpool and play there?" the Cardiff boss told reporters after beating Birmingham. "He is their player. I'm not going to pick and choose where he should go, but he is absolute quality.
"He is a great pro. Even the first game when he was left out and everybody was shocked, he responded brilliantly.
"That's what I love about him. His ability and sheer determination to play.
"He is Liverpool's player and I would love to see him go back and play there.
"But he has been to Hull, Bournemouth, Derby, here. I think he feels he got a raw deal from the Premier League from his time at Bournemouth, because they got relegated and almost like it reflects badly on him.
"It shouldn't do. I saw him play for them. I sincerely hope [the Premier League] is where he is next year because that's where he deserves to be."