Their is no tax system in Europe that i cannot run circle's round,and i do not need to know their tax laws,i know their nature,and from my base in the Internet,i do as i please.
So how do you propose to 'run away' from a Polish tax system that has no scruples about freezing people's bank accounts and will happily do so over minor discrepancies? Poland has been very quick to enter people's details onto SIS4All - someone with frozen bank accounts who is wanted in Poland over tax issues will find themselves blacklisted from Schengen as a result. It's also quite possible for Poland to issue a European Arrest Warrant over this - and these are enforcable throughout the entire EU.
I'm sure it's possible to defraud the Polish tax man - but I'm equally sure that it's diabolically stupid to attempt to do so when they'll have plenty of information about you on file that can be used to issue a European Arrest Warrant and a nice 'hit' in SIS4All.