So let me get this right ..
As example, after 6 year employment your boss one day says 'Hey NiCkNaMe, I've got to print something today to win a £10m contract, I'm stuck in meetings, and the printer is out of ink, here's £10 could you nip 5 minutes down the road and buy a cartridge, fit it and print this single 4 page document I've emailed you? It'll win us £10m of work! Sorry my hands are absolutely tied. Consider your other work on hold for the hour or so'
You'd answer
'Go screw yourself. I'm here as a programmer/whatever not an admin lackey and general dogsbody - there's no way I'm helping out the company in this way. Read my contract, fool. By the way, as you're starting to abuse me, I'm outta here - consider this my notice'.
Wow, way to go .. please, please, please, never work for me.