German speaking countries(apart from Switzerland) also don't pay their developers particularly well either as unlike US/UK/Eastern Europe they artificially cap salaries instead of letting the market dictate so of course they don't like people switching jobs as they have to pay more to stay competitive, even managing to convince their developers that €80k is a top salary while their counterparts in Warsaw and Bucharest make that or even more. German/Austrian devs are severely underpaid.

Also, unlike UK/US, they have this nasty habbit of not mentioning their salary range/hiring budget in job ads to low ball you during negotiations.

Well 80K can get you pretty far in Berlin, as opposed to SF. Rent is probably cheaper than Warsaw too.

Which companies in Bucharest or Warsaw pay 80.000€? Most companies in the entire EU don't pay that.

Swiss/London/NY based banks and finance companies.

80K is pocket change compared to what they would have to pay in their home markets for experienced devs.

Not many outside of finance though..

I look at it the other way around. They're probably talented enough to make it past probation, so their leaving was them deciding to leave, rather than not making it. That is, any investment you make in them, giving them slack to get up to speed in a codebase, you'll lose because they don't stick around.