Raising Revenue question.....?

Question

which of these 7 do you think is the most effective, fair and why?
Sales
income
sin
fees
gas
death
gambling

Answer 1

Fees, cos it's for work actually performed, and is subject to negotiation and terms and conditions before the work is commenced. If the work is not up to standard, the customer can fall back on the terms and conditions and ask for either a discount or rectification work.