According to Eurostat, 170,000 Ukrainians came to Poland for fewer than 12 months in 2013 while government records show that 630 settled permanently.
Permanent in this sense is a specific legal term referring to the acquisition of permanent residency - which takes at least 5 years. Someone can move permanently to Poland but not be permanently resident in the eyes of the law.
These are temporary workers - not residents which is what the figure I cited was explaining.
Again - temporary in the eyes of the law is a very specific concept. It's now possible to obtain 3 year 'temporary' residence permits - which all residence permits are if they aren't permanent residence permits.
This is much like Polish workers would come to Germany to work on farms for the summer
No, it's entirely different, like I've explained above.
You're right - there were 331k work permits issued to Ukranians in 2014 - but that still represents less than .01% of the entire population.
You sure about your maths?
331k work permits issued out of an estimated 38.5 million people in Poland means 0.86% of the population. When you consider that Muslims only make up 0.9% of people living in the USA, then you get the idea as to how many are turning up. If we take the 500,000 number that was mentioned last year, then it's 1.3% of the population is Ukrainian.
Remember that work permits don't tell the full story - there are plenty of Ukrainians working on the side on short term tourist visas / student visas.
The majority of the people, at least in Wroclaw, who have a decent bank account and a German car made their money abroad.
Not really. That's an outdated view from 2004 and really isn't the case anymore. The manual workers that went to the West tend to stay, and in Wrocław, no electrician working in London is going to earn more than an attorney here. For a start, a reasonable family property in Wrocław is now pushing the 100,000 Euro mark - which is difficult enough for Londoners to save, let alone some Polish electrician.
Less than 1% of the total population isn't exactly 'droves of people stealing Polish jobs'
They're not stealing jobs, they're merely taking them because they're willing to do the work. It's nearly impossible to find good physical Polish workers these days - even retail shops are struggling in the major cities. Wrocław in particular is quite remarkable for how many Ukrainians/Russians have integrated - it's normal to encounter them working in shops, in hotels, etc etc. The funny thing is that you normally don't notice them unless you're paying close attention, because they have a habit of learning Polish ridiculously quickly.
Just watch. I'm willing to be that we'll see the Ukrainian/Belarusian/Russians number at least 5% by 2020.