There is an economic argument that you should spend your money as much as possible - rather than save it. This does help the economy. Lot's of economic evidence for this - from Keynes through to Modigliani (the economist, not the artist - don't know what his views were).
Sticking with Modigliani (and lots of others) there is a strong argument against saving up money and leaving it to your children. It provides a disincentive to them to actually develop and work. That is why lots of very wealthy people (Anita Roddick, the Gateses, Sting) won't leave huge amounts to their kids.
I don't know TE or tbh anything about her. But it looks as if she has never earned her own money - living off her fathers money and her fathers name. So it isn't as if she has earned this cash.
You could argue (preparing for incoming) for an inheritance tax system whereby if you leave anyone more than, as an example, £5m then everything above that is taken by the state and re-distributed (paying for services etc.)
This doesn't provide a disincentive to individual industry and development but does provide an incentive to acquire wealth and spend it.