You realize that has not been the case for over 20 years right?
You have to go to thirty if you want fifty.
And with the "up or out" system only senor officers and E9s are retiring with 50%.
What year did it change to getting half base pay at 30 years? I got 50% when I retired at 20 years in 1993. and if one retired with more years, they got more.