Law / Contracts for IT staff in Poland [12]

Hi,
I am doing some research for my company as we may be setting up a small IT company in Poland.
I've been told by somebody that most IT companies offer a contract that allows for their "creative" work, e.g. development to be taxed at a lower rate. for example the contact would be split 70%creative /30% admin and the 70% is at a lower rate of tax.

It sounds like a bit of a scam to me. Have any members of the thread such a contract?
Thank you!