Rubbish.
London is a blood sucking parasite on the rest of the UK. The whole country will be better off when London PLC starts it's long overdue rapid decline into obscurity.
You're right, the imbalance is totally unfair and every city across the country should be doing equally badly to make you feel better.
If other cities want to try to compete then they are welcome, but this shouldn't be done by discouraging people from London. You could try launching your new tech startup in Newcastle if you want, let me know how many quality people are willing to relocate there.
People who have a strange jealousy at the success of London to the extent that they want it to fail are literally biting the hand that feeds.