ALLOWANCES: Fiscal responsibility

A Jennersville friend shared her clever strategy for instilling fiscal responsibility in her young teenagers. She gives each kid $20 a week, but if beds aren't made, chores aren't done, the kitchen is left untidy or other infractions are committed, she charges them $1 per offense.
"So how's it working?" I asked.
She said the kids tend to be a little lax in the beginning of the week, but as the money dwindles toward the end of the week, they up their game. She said they're starting to realize that in order to afford Starbucks trips with their pals (to "do homework"), they need to save every dollar.
My friend said her husband initially thought this would be a losing effort but is impressed with how effective it has been.