There are approximately one million British people living in other EU countries and approx three million of them living here, so that shows who benefits the most from this EU policy.
Those that come here are able to take full advantage of our superior health, education, social security etc systems. They will also usually need rented housing, a job and/or benefits and are likely to have children that need maternity care, education etc.
Most of those who have moved from Britain will be pensioners wanting a warmer climate.
They usually purchase a new build in an English community with the proceeds from their house sale, their pension is paid for by the British Government ie they bring money into their host country (providing employment, whilst needing none themselves) and take little out. For obvious reasons, they are unlikely to have any young children.
Other EU countries may well decide to reciprocate our decision, but it wouldn't be in their financial interests to do so.
https://www.ons.gov.uk/economy/inves...duk/2017-09-05
I don't think that our welfare state should be dismantled, nor do I have any problem paying taxes to help those less fortunate than myself. I do have a problem with others coming over from abroad who, intentionally or otherwise, milk our system.
Our welfare state isn't an international system open to everybody, it's paid for and meant for people who are legally and morally entitled to it in the UK.