The Guardian...what a surprise.
The Brits embraced "Brexit" by a slim majority because they saw that the open borders with the rest of Europe were inviting wastrels from shit-hole countries into their midst (where "Mohammed" is, ironically, the most common "Christian" name in London). More than one observant Englishman has observed that London is no longer an English city.
Every time a line is drawn - an essential component of every law - there will be apparent injustices on the borderlines of that law, a few of which examples are presented in the article. There are people who can't get a tax credit because their taxable income is fifty pence greater than the limit set by law...the thief who steals a bracelet worth $1,001 is punished twice as harshly as his mate who stole a $999 bracelet. The solution is not to abandon the law; maybe the best solution is to tolerate the occasional apparent injustice in favor of the greater common good.
Just because you "want to work in England" does not render you entitled to live and work there, even if your employer would profit by your work. That's not the way it works.
And it goes without saying that the United States has lost its national sovereignty because our sitting President invites millions of foreign, third-world wretches into our midst in the hope that one of his successors will turn them all into voting American citizens one day.