Why is the Dad ruled by the iron fist, but the Mom is self governed?

Here is the situation:

My Ex-wife and I went back to court last September because she complained that the kids health insurance wasn't sufficient, and she needed more money.

Direct result was, my child support went up, which it should have, I was making more money than I did when I was originally divorced, and the court ruled that since my ex decided to move to Georgia, she was solely responsible for paying for their flights to and from my scheduled visitation (about 10 trips a year)... and the court also said that because of the amount of child support I am now paying my ex can not submit extra expenditures that I had previously been paying for, like basketball sign up, cloths, field trips, musical instruments, and half of all air fair...

So now when I ask my ex to produce the new insurance for the kids, she simply says she can not afford it, and that they only have emergency medical insurance... THIS IS THE SAME INSURANCE SHE HAD IN PLACE BEFORE WE WENT TO COURT IN SEPTEMBER... and she simply says that she is paying for flights, and can't afford to do both... if I said I couldn't pay the elevated child support, I would be in jail, right? Why do I have to pay a lawyer to make sure that my kids are properly insured in case of sickness?

Any thoughts?