Not that dangerous as it sounds in the US. In the UK, there are dangers for family life in mixed citizenship families, after brexit was decided.
I am sure that there are more inconveniences that I have not heard about yet.
I find that astonishing. I had a quick look and couldn't find anything that suggested you need to earn a minimum amount. The only requirement (regarding employment) that I saw was that the resident much meet the EU Treaty requirements but any employment restrictions are for non-UK citizens.
Do you possibly have a source as I'd be very interested indeed?