Hi all,
was just wondering if it is ethical to give a thankyou voucher to people who pass me work through various big businesses.
I particularly get passed a lot of work from the local council and various housing associations and would like to give the individuals a voucher for free carpet cleaning, but i got to thinking this might look like a bit of bribery

The fact is i have quite good working relationships with these people and would like to just express my appreciation (and of course keep the work coming

)
They pass me many thousands of pounds of work and feel it would be appropiate to give them something in return.
does anyone do anything similar or should i approach it a different way?
regards
steve