The overwhelming majority even.
Not the majority I'm familiar with. If by "IT job" you mean some simple data entry or an off-site seo services then yes, they will always be chasing chunks of low paid jobs.
However, I'm not aware of any good Perl developer who would complain about getting decent paid job in Warsaw.
The difference is like between professional WRC driver and your local cabbie :-)
And they are of course a booming gaming industry with companies like CDPR, Techland, 11 Bit Studios, Creepy jar and so on...