Free Parking Isn't Free
"Free parking is not, of course, really free. The costs of building the car parks, as well as cleaning, lighting, repairing and securing them, are passed on to the people who use the buildings to which they are attached. Restaurant meals and cinema tickets are more pricey; flats are more expensive; office workers are presumably paid less. Everybody pays, whether or not they drive. And that has an unfortunate distributional effect, because young people drive a little less than the middle-aged and the poor drive less than the rich. In America, 17% of blacks and 12% of Hispanics who lived in big cities usually took public transport to work in 2013, whereas 7% of whites did. Free parking represents a subsidy for older people that is paid disproportionately by the young and a subsidy for the wealthy that is paid by the poor."
Excerpt from How not to create traffic jams, pollution and urban sprawl at Economist.com.