Kramer was always in a good mood, has a good love toward everyone, seems to have never worked a day in his life, and has to bum food and drink off of his good pal Jerry. Everyone that Kramer meets seems to like him in one way or another, and let's not forget, let's not forget Dude that he has sex with woman without even dating, this is very dude, man.
Well fuck yeah man. Kramer just seems to go along with whatever is happening.
It's like Costanza said: he lives in a fantasy world. Costanza, being something of an anti-kramer, anti-dude, doesn't understand his lifestyle.
He just can't comprehend that by taking 'er easy, everything will work out all right.
Kramer isn't stressed about having a job or a date. He just finds money and sex on his way while abiding.