What is the word that is the opposite of

Politician.  No??  Then it's profligate, although they're synonyms.

If the hoarding were to be done with money ~ Spendthrift.

MINIMALIST ... they keep very little around them

..........redraoh..........

I have heard of a mental illness where people keeping giving everything away.  I've heard it can really destroy a family, however, I couldn't find a name for that condition through a quick Google search.  Maybe if you take the time to investigate it online, you will find your answer.

char,  I found the following on Yahoo Xtra Answers.  I hope it helps.

Sparky's Mom

Non-materialism, when it's not obsessive. If it's a choice you make and it doesn't posess you, it is a reasonable way to live your life. Lots of people do this in order to simplify their lives, or to re-introduce some sense of structure or discipline into their lives.

The catch is....the opposite of one obsession often ends up being obsessive as well. Sometimes people can feel like they're not *good enough* to have good stuff in life, or that they *should* spend time and money to take proper care of themselves--never mind anything that might be construed as "pampering", which would also be pre-judged as "wasteful" or a "guilty pleasure" with the emphasis on the *guilt*.

In this case, some terms to look for would be "false guilt" or "lack of self-care" due to depression, and it's attendant lack of self-esteem, or in extreme cases outright self-hatred. It's a form of self-sabotage in that people feel they're not good enough: they keep on hearing the insults and personal barbs that they hear, keep on hearing them day in and day out even when *objectively* this sort of thing might only happen 1-2 times a month at most. And so they feel like nothing they do *will work* or will be "good enough to shut them up" and that engenders just giving up, curling up in a ball and not wanting to *leave the house*.

It's how depression can engender both social anxiety and poor hygiene if it's allowed to go on, un- or undertreated, long enough. And of course, for aggressive people who attack and abuse and insult, anxious folks with poor hygiene are "asking for it", so when these depressed souls actually *do* brave leaving the house, they attract more insulting people, which in turn reinforces the whole damned thing.

The literal opposite of obsessive hoarding would be obsessive self-denial, or obsessive self-privation, from a constantly reinforced lack of self-worth. This reinforcement can be both external and objective, or internalized and subjective. It's a feedback loop and a vicious cycle either way.

try "squanderer".