Of course they have the capability. The North Korean government has billions of dollars to throw at any project they come up with. The breakin at Sony, sourced commercially in the US, might have cost mid-six-figures.
Sure they do. Look at what they spend on their military, which in reality does them no good whatsoever (their true defenses are diplomacy with China and their hostage to the south).
True, though you could argue that feeding their military is a social welfare program of sorts, though it also redirects resources from the general public.