>Are trying to get rid of the class system or what?
Yes. Instead of your libertarian 'utopia' where 5% of the population have 99% of the wealth, Chavez wants to create a society in which all citizens have a good standard of living. That means taxing the people who have gotten rich from exploiting workers and using that money to build schools, roads, and hospitals. The poor will still be poor for a time, but they will at least be able to feed their families and have something to look forward to.
Eventually, a strong middle class can turn Venezuela into a cultural and economic power. The US doesn't want this. Once we get done subjugating the Iranians, Venezuela will have to deal with war if our sabotage and assassination attempts fail. So, it makes sense to invest in weapons.