It's simple:  choice.  Inherited money was given by choice; tax dollars are not.

While you choose to disagree, the inherited money is private; the tax money is public.  There is a difference, and the later is a larger burden to society than the former (which in the net is probably not a burden at all - while you can argue for the productivity lost, most of that money is going to be invested and thus is available as capital to others who will make better use of it, PLUS the trust fund baby is paying taxes into the system - none of these benefits exist when someone is living on government money).

Maybe the money paid to the sports star is just as big a drain overall as the money I pay out in taxes, but the first remains a CHOICE and the second remains a REQUIREMENT.

Be clear, I don't respect an aimless trust fund baby as a person.  I probably respect them less than the average welfare recipient.  The former had it easy and wasted it; the later never had an opportunity and isn't to blame.  But I'm not paying for the trust fund babies life (in fact, I'm probably making money from it since they tend to like to hire others to do everything), and what they do with it isn't my concern.

But to ask me to fund your life so you can make choices I feel I don't have the luxury of making ... no deal.  Taxes are forced payments intended for the betterment of society.  Missuse the money, and voters will eventually rise up in protest and change the system.

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PS - I have a feeling we will have to agree to disagree on this, and I am always willing to do that, but I still felt I needed to state my case.  I truly believe most of the world thinks the way I do on this, whether or not you like it, you will probably have to accept it.