Its not the politics, but the practice of the USN, and as Jeff stated, the deck can be brought up to any spec desired as illustrated by the Wasp. It is not in the dogma or doctrine of the USN to to build ramps on Catobar carriers since the Catobar system is far more capable, and in my opinion as a pilot, it is far safer to be launched with flying speed, than to jump off the end of the deck at high alpha and low airspeed. I have made most of my departures off of a short sod strip, if the grass is tall, the field is short or soft, a cylinder a little low on compression, the airplane has a cruise prop, the nose gear strut flat or underinflated, same with tires, the airplane over gross, too many or to large a load, too much fuel, or there are obstructions, you will reduce airspeed from best rate to best angle of climb. As you do the pucker factor goes way up, add adverse winds, weather, or darkness and the odds of an accident or incident go way up, so no thanks to a ramp, I'm certain a very high percentage of USN pilots would agree, speed is life, especially off the deck on departure!
