First off, fuck off, Tumblr's most prolific genocide apologist.
Second I am one of the dozens, perhaps even hundreds, of people who don't live in your fuckass country.
In THIS country, the one THIS POST IS ABOUT, address, ID, and proof of citizenship or long term right to remain in the country to access employment was introduced specifically in 2014 and strengthened in 2016, specifically to, and I quote the government minister responsible, "create in Britain a really hostile environment for migrants."
Now, this came along with the rescinding of the right to work, to bank, or to rent homes for people who have not yet had their asylum applications fully processed (a process which can take years or in some cases up to a decade and for which they have to be resident in the UK).
It was also part of a raft of policies which opened up people who could not produce 100% accurate paperwork for their right to live and work in the UK, or who tried to earn a basic living while their asylum claim processed, to indefinite imprisonment without trial and/or deportation, in some cases to third countries where they'd never been. This led directly to the Windrush scandal, in which hundreds if not thousands of Black Brits, who had been living entirely legally in the country since they were children in the early 50s, were detained, with over 80 people in their 60s-80s being deported to countries they'd left as small children.
These policies were incredibly specifically set up to harm immigrants, specifically refugees. Prior to a decade ago, this country had got on fine without mandatory ID, citizenship and address checks on recruitment. It hasn't correlated to a drastic decrease in either debt defaulting or in human trafficking - in fact, both those things are increasing because the economy is fucked and it turns out that if you make it impossible for people to work legally they're much more vulnerable to modern slavery.
What it has done, other than achieve its malign (and explicit) goal of making life shittier for Literal Fucking Refugees, is to worsen the poverty trap faced by the UK's increasingly large group of homeless and housing insecure people - if you don't have an address, you can't get a job, so you can't get money for rent or deposit, so you can't get an address, so you can't get money, so you can't get an address, etc. And it's also significantly worsened the situation for GRT/travelling communities who don't have fixed addresses and are already one of this country's most socially excluded groups, and increased the risks and difficulties for trans people in an increasingly trans-hostile country.
I'm afraid that the fact that you live in a paranoid nation with no worker's rights and assume it's the centre of the world is not going to convince me to forget that this is a) a legal change which has literally happened during my working life and b) extremely explicitly targeted at harming a specific group of vulnerable people.
If you respond to this I assume your response will be 'wehhhh but how am I meant to know you're not American'. Don't expect you to take this on board because you're Professional-Class Tumblr Fuckwit Prismatic-Bell, but if that is what you're thinking I invite you to consider that a large majority of the world's population are not American and also may know more than you about the thing they choose to talk about.