Because, doing all those things you mentioned, requires $$$$ and no one is handing that out for free. It takes more hours (more $$) these days to pay for stuff than it did ten years ago but wages haven't increased as much as cost of living.
For me to go to the gym I have to pay the membership fee so they can maintain the facility. Vacation, bro one week camping with the family costs as much as one week of pay and to go camping I want a reliable and comfortable vehicle, clothes, equipment for my family therefore $$thus the need to work. I just took my son to get geared up for soccer... Lol it takes three items to drop a $100.00 bill. I don't believe in living to work but I do believe in working to live.