Well done Sturridge for reaching 50 in 87 games, the only sad fact in that is the 87 games took 3.5 years, hopefully he will play 87 games in the next 2 years to make it 100 goals!
As to whether he is jealous etc of Origi, Coutinho etc, whatever motivates him does not bother me, as long as he scores goals and Liverpool win games, some of the best strike partnerships have had players who did not like each other but scored goals together.