He could have also quietly gone away and enjoyed his millions, yet he continues to work and campaign (because it's not just being in the media and shouting about switching and reclaiming, he does a lot of campaigning work and is constantly badgering the government, standing up for the ordinary person, to the extent that they actually consult him now because they know he'll be in their face about mortgage interest rate hikes, energy costs or a consumer issue sooner or later anyway) and without him, it's unlikely we'd have a lot of the current help available with these issues that have affected people so badly.
He also donated huge amounts of his own money (millions!) to COVID and energy costs support funds, set up a 'money and mental health' charity foundation and paid for and wrote a financial education textbook, gave a copy to all schools and made it freely available for everyone to download.
Plus the Moneysaving Expert website is a fantastic resource for just about all 'money' issues (except investments, which he is always clear he stays away from) and the answer to just about any money issue like budgeting, mortgage or energy cost worries, or any consumer issue is 'look on Moneysaving Expert'.
For example, anyone left high and dry by the recent air traffic control issues would be able to look through their standard guide to flight delay rights and, within a day or two at most, been able to find a comprehensive, easy to understand, guide that has been tailored to the specific air traffic control fuck up a couple of weeks ago.