Sounds rather extreme. What about all the more minor violent offenses out there? You really want to kill someone every time someone slaps someone in the face or spanks a child? Because technically those are violent. Yes, violence is violence and should be punished (except when necessitated by self-defense) but the punishment should not be worse than the damage caused by the offense itself.
Some other ideas for changes:
*Improve the educational system. Too much emphasis is placed on whether or not students can pass some standardized test. Students are taught that education is all about grades and passing tests. Where is the curiosity and desire to learn instilled? Encourage more independent thinking and creativity in the classroom rather than just rote memorization.
*More and better public transportation options. It would be greener and think about all the money people could save by not having to depend on cars so much.
*Universal health care for the United States. The USA is one of the few developed countries to not have this in place. An already poor person gets diagnosed with a health condition that necessitates medical care and they just fall deeper in the hole through no fault of their own.
*More job opportunities and less bureaucracy in the workplace. More fair hiring practices. All too often hiring decisions are made because someone happens to know the right person. Alot of very talented people out there are not getting jobs that match their skill level.
*Legalize marijuana. If you're not going to legalize it, at least soften the sentence for those caught with it. Putting them in jail is ridiculous. Marijuana smokers are only harming themselves, not others.
*More healthy eating options that are also quick and convenient. For those who don't like to cook much, have more healthy options available when eating out and have smaller portion sizes.