Evolution doesn't function in humans?

/facepalm

Every time someone chooses someone else to have children with, that is evolution functioning.

Medicine doesn't stop evolution. It allows people to live longer, which is only evolutionarily relevant if they reproduce (and in doing so, pass on defective genes). Allowing more defective genes into the population doesn't kill evolution at all.

Leisure time is actually a function of sexual selection. Leisure time exists in animals that are not humans, first of all. Beyond that, leisure time contributes to the sexual selection process because an organism with time to spend doing nothing related to survival is clearly genetically fit. This tells potential mates that their genes are worth combining with their own for reproduction. This is what's known as a fitness indicator. Other examples of fitness indicators are peacock tails, and in humans, other examples are intelligence, athletic prowess, artistic ability, and compassion.

There is no killing evolution. The best you can hope is to control it completely in a Gattaca-esque dystopian world. As long as we are reproducing, evolution is working.