It's irresponsible to let your bills go.
Will has to pay the utility bill which has gone up considerably because of the summer heat.
Will wants to buy a new game which just came out.
Will decides to wait until his next paycheck to buy the game and pays the bill now.
Will buys the game first and lets his bill lapse.
Will saves money on fees and reinforces responsible habits.
Will has to pay a late fee on his bill.