I earn 300k, pay the rent at 50k, then my right hand pays 450k to my left hand and I claim a 200k loss. Not that I disapprove of that, I just wish I could pull

I earn 300k, pay the rent at 50k, then my right hand pays 450k to my left hand and I claim a 200k loss. Not that I disapprove of that, I just wish I could pull the same trick with HMRC - I'm just not rich enough or in friendly terms with governments overseas to do that. Is this equality?