And the joy of having more take-home pay now would evaporate when the bills start coming due.

These companies have the potential to increase access to the medication and reduce cost, yet online and take-home services also increase the chances of misuse or diversion, Turnipseed said.

"A key take-home message is the importance of passengers cleaning their seat area, including the tray table and the seat-back entertainment system," said Simon Williams, chief executive of charity Anaphylaxis UK.

The attraction of this option for Ms Reeves is that she can raise money without a visible difference to people's take-home pay.

But the tip loophole isn’t about a general increase in take-home pay; it’s about winning votes in Nevada.