There are always ways and means to avoid paying taxes, especially if we are talking about cash transactions and P2P deals. We all decide if we want to pay those taxes or not. If you leave digital fingerprints for monetary transactions, you could get caught and questioned. If you don't, the chances are significantly smaller.
many countries have many tax loopholes. the main one is loans.
so allow your forum pseudonym to loan(personal loan) your real life name a 0% interest with a 100 year repayment plan of £0.01 with no penalty for non-payment.