National Parks are not an "entertainment option" like movies, sports, or dining. They are the birthright and heritage of every American and must be kept affordable so all Americans who want to can visit them. Just because $25 is not a lot of money to you does not mean everyone is so comfortable. I remember my folks making significant financial sacrifices in order to take us kids to visit National Parks because they thought it was important to give us a sense of ownership and pride in them. When they are just another commercial option, they have lost their constituency and purpose.
The "politics" that got entrance fee increase plans put on hold consisted of elected officials listening to and responding to the individuals and businesses they represent. I for one applaud them for doing that and also thank NPS Director Bomar for doing the right thing.