Just to be clear, Motabity isn’t a charity which people donate to.
It’s only ‘taxpayer-funded’ in the sense that people who get higher rate disability benefit are entitled to use it.
“The Scheme is open to anyone who receives the Higher Rate Mobility Component of Disability Living Allowance, the Enhanced Mobility Component of Personal Independence Payment or the War Pensioners' Mobility Supplement. As of April 2018, the amount payable for HRDLA or the Enhanced Mobility rate of PIP and WPMS is £59.75 per week.[4] Those wishing to lease through Motability must have at least twelve months' award length remaining when they apply. The Care Component of DLA cannot be used to fund a vehicle through the scheme” from Wikipedia.
People in receipt of benefits are just as entitled to choose what to spend their money on as anyone else.
You could equally well argue that football players’ salaries are taxpayer-funded, because taxpayers choose to go and watch football matches.
I’m not in anyway justifying this CEO’s salary or lifestyle, but it seems to me that Motability was originally founded with good intentions, but it’s just a company. To call the CEO a ‘fat-cat charity boss’ and use his lifestyle to have a swipe at charities in general, isn’t fair to genuine charities.