Of course, if the "owners" are only 10% of a population and 90% of the population is just toiling to pay their bills and eat, then that system is rotten.
Yeah I think its more like 90/10 than 2/3-1/3.
While you may view 10% as owners, and then think the 90% of "workers" are inherently exploited, I don't think the owner/worker dichotomy you subscribe to really matters. I know plenty of rich people, in the top 10% wealthiest in the US, who are miserable in their wealth. I know others who purposefully left high income jobs for lower paying ones because they wanted more personal time. And I know people who are much further down the scale, in the bottom half, who are perfectly happy.
To me, if the system permits people making a reasonable salary to live a happy life, then that's perfect. Economis is really all about utility, not wealth, and if you can use your income to arrange your life in a way that makes you happy, that's all that an economic system can really be asked to do. Surveys comparing wealth to happiness find that after around $40/50k a year, happiness doesn't really increase with wealth, so as long as one can bassically afford to live a comfortable life, they're as happy as money can get them.