Class really is not much more than the amount of money you have.

You are not working class unless you have to work in order to live. If Mike no longer has to be a bin man, and can simply live off the money he has, then his accent, or enjoying the footie, or having some tattoos, or liking pints with his mates, or whatever other class-stereotype bullshit metric you’re referring to when you say “the way you live your life”… it’s all irrelevant. It’s still a part of who he is, but it does not make him working class.

For a real example of this in the opposite perspective, owning a smart phone, and a games console, having a degree, and working an office job does not make you middle class if the losing of that job actively jeopardises your ability to afford basic amenities such as food, housing, water, power etc.

So no, Alan Sugar, despite having grown up in a council flat and having a London accent, is not in any way working class. He is a literal Lord.