In Germany you receive welfare no matter of your work history. True, you need to sell your assets, like your house, but I think that's understandable. Your 65 year old retiree would receive ~410€/mo. + costs for an apartment (incl. heating etc). Again, I'm not at all saying that makes a decent living. Just that no one is really FORCED to work there.

Greece has a 25% unemployment rate. Therefore if you did not find anyone wanting to do your job, it must have been a really bad one. Or - my guess - you just didn't offered to pay a reasonable amount.

I don't know the exact employment rate among migrants, but I guess it makes no sense to discuss it here. I'm just sure that, if the unemployment rate amongst the migrants would be low, you were crying about the bad migrants taking over our jobs.