Japan doesn't spend money on illegal aliens, and they don't encourage criminal cultures in their society. If you want to become a citizen, you have to prove #1 that you will embrace Japan's national ideology before any other, and #2, that you can provide adequately for yourself.
America doesn't do those things. We invite criminals across our borders, and we feed and provide them with everything they want. We encourage them to shit on and in our country, and encourage them and often pay them to riot against Americans and American values.