Impressionist and Post-Impressionist

In the painting "Moulin de la Galette" by Pierre-Auguste Renoir, we see the joy and carefree environment of a party in Paris. Everyone is enjoying themselves and other peoples company, they talk, laugh and dance, they are free to enjoy themselves in anyway they want. Now this painting was painted in 1876, if you change their clothes and possibly their location to modern day dress and place them anywhere in the world it becomes the same parties of today in 2008. We still dance, laugh and enjoy other peoples company. But then why do we seem so detached from the people in the painting. I can't speak for you all but for myself I see no common ground between the people on the canvas and me, but they do represent me. They're young and artsy, but I think the significant difference between me and them is they have no problems. Renoir painted them in a world with no problems, that was his purpose and goal for this painting and he conveys it so well (to me) that the characters in the painting lack one element of humanity...pain... they lack any sense of anguish or regret, they are not worn down by the world, they just party and are having a great time. I envy them.