Obviously the money is much lower in Poland for teachers
Actually you would be surprised at how badly EFL often pays in Spain and Germany and how well it can pay in Warsaw if you work for the right organisation.
why do Brits, Irish and American come here to teach in the first place. They cant all have Polish girlfriends..
Not that many do any more. Here in Warsaw there is a fraction of the number who were here 10 years' ago.
Of those who are here, some are here long term and own their home, are married with kids, partnered etc and have deep ties to Poland. Some of the Americans who come have Polish blood and want to create ties. There are also others who are teaching EFL as a means to an end - they have a Polish husband or wife who wants to live here but either lack the skills in Polish to do anything else or are unimpressed by the salary levels in other jobs. Others are just washed-up here, without the drive, money or qualifications to go somewhere better.
But having said that,m some are here because they genuinely like the place and/or the work.