One-sided CSA don’t care as long as they get money

My partner pays csa, is not allowed to see the children so why do the csa company only concentrate on one side, I have never heard of such a one sided thing in my life, you don’t seem interested in the children’s welfare just money, I also know people who are self employed and don’t pay a penny, you don’t chase them, you only chase the easy catch, the csa needs to be blown up and started again, with some very fare rules unlike what that have now, only interested in the money, don’t care about mostly dads who can’t see there kids for years, can’t say anymore cos nobody listens anyway!