We're not talking about London. We're talking about the small central area covered by the congestion charge. Very few of the people who work in London drive into the congestion zone every day for work. It would be hell unless your chauffeur takes the strain while you sit behind your glass partition reading your briefings.
"Every day more than 31 million journeys" on tfl public transport
https://tfl.gov.uk/corporate/about-tfl/what-we-do
How many people do you know that drive every day from Leafy Surrey to the West End or the City? How many of them are low-paid? What is their daily cost for parking?