I have been dating my boyfriend for almost a year he has kids as so do i in his eyes his kids do no wrong they?

lie to him and he dosen't do anything about it they don't have any chores or responsibilties he just does for them no matter what they do in his eyes they do no wrong when it comes to my kids they have chores and have to earn what they get i don't see the fairness in this he says fairness has nothing to do with it that they are his kids and he will buy for them and do what he wants my kids have rules to where his don't my kids ask me why they get more then them and they do nothing to earn it don't know what to do and how to react tried talking to him but ends with an agument please help with some advice