wholley karl marx that man. i'm not advocating socialism but we see a whole lot of sharing that occurs voluntarily. one of the forms of sharing we see voluntarily, and this is kind of fascinating, if you look at u.s. household expenditure date of one of the categories that you can see, and it's called consumer expenditure survey is charitable giving. you can see all kind of these categories of expenditures, cash contributions to the second one to charity, education, this is a picture showing again those elasticities of expenditure with respect to income. so we have the clear luxury activities of goods at the left, and then the necessities and over here on the right. for a single food and housing and over here on the right is necessities and that makes sense. but all the way on the left we have pensions, so that saving for the future. we have cash contributions to charity, and we have education and entertainment and so forth and stuff in the middle. but the point i wanted to emphasize here is that cash contributi