Inside a country yes, with the agreement if the destination country yes, but there are very few precedents for people moving “for a better life” to destination countries without that country’s approval.
Removing barriers to movement is not a solution by itself because people would be even more susceptible to the gangs that traffic them here (as Merkel found). You have to have a system to manage migration or you end up with chaos.
As an aside, the free movement of Poles has had an effect both here and in Poland; here some have been exploited considerably in low paid work and accommodation and there the absence of so many young and middle aged Poles working abroad has had the effect of pushing domestic politics rightward by a considerable margin.
That is the direct implication of your posts though Bruce, that the people who come here are doing so because here is better than there is. It might be, but surely the solution is to make there better, not get people here with false hope and at great risk to themselves.
Well within the EU no one has to ask the destination country's permission to move. If you want to move and feel that doing so will be good for you, you do it. It's not really anyone else's business, and the idea that a bureaucrat would no more about you and your situation than you do is bonkers. That's a faith in the machinery of state that is completely ungrounded in any kind of evidence. Not only do EU migrants tend to perform better on pretty much every metric imaginable when compared to the 'managed' kind, but there is also no hint of the chaos you describe. It's best to leave talk like that to Farage.
Regarding exploitation, if you look at actual government figures -
http://www.gla.gov.uk/media/3537/ex...xploitation-report-final-version-may-2018.pdf - the highest number of those working in forced slavery were Albanian, Vietnamese and British, so all people whom we have 'control' over and can supposedly manage. Even if we could mitigate this by controlling migration, the apparent willingness to blame the victims rather than the criminals is very concerning.
Similarly, evidence actually shows that emigration actually benefits the sending country rather than harms it -
https://www.rand.org/pubs/monograph_reports/MR244.html. Not only do migrants send substantial remittances home, but they also learn valuable skills and build valuable networks that are heavily used when they do return home. What's more, by moving, they tend to reduce unemployment at home, and increase wages of those who remain. It's no surprise that the Visegrad countries have not only seen the highest economic growth in the EU but also have the lowest unemployment, despite many nationals moving elsewhere in the EU since 2004.
