Does a billionaire business owner need a huge personal yacht as business asset for the business to serve the public?

Mark Zuckerberg's 300 million dollar yacht is an example of wealth that I think should be taxed more. I can see a billionaire business owner needs to keep the wealth that runs the business, like server farms for instance, but a huge yacht for personal private use? Maybe he needs it to entertain for recruiting top talent to the company? That's all I can think of for it's possible justification. Somewhere, a line does need to be drawn.

Excerpt exchange from comments on my Facebook page.

YIKES. You're making the case that its cost was tax deductible as a business expense. -Phil.

My Reply. I don't know the specifics in these cases, but right wingers often say, "the rich need their money as they create the jobs and provide the products and services." Right wingers and other members of the rich do seem to find ways to justify whatever. They can afford the best lawyers money can buy. -Robert.

Phil's reply. We have the best Congress that money can buy. -Phil.