If we are not 'customers' of HMRC, what are we?

It's been many years since HMRC (the taxman) started to use the word 'customers' to refer to all types of taxpayers and tax credit claimants.  Of course 'customers' normally get a choice as to where they shop so it's not the right word.  

Here are 11 alternative, not too serious, descriptions. Do you have any other suggestions?

1. Slaves
2. Victims
3. Codees - Anyone who deals with the tax authorities has to have a code, so that's the common element.
4. Punters
5. Suckers 
6. Cash cows
7. Mugs
8. Muggles 
9. Prey
10. Government financiers
11. Lemons (as in "squeeze them until the pips squeak")