The thing is : the 1% want the best. To take the musician example, they will take the most talented and provide them with the best instruments.
Of course these musicians and instruments are rare and sought after and therefore expensive. But that's fine for the 1% : they have money, the point is to use it, right.
As a result, these musicians and people making these instruments will end up quite wealthy, they will become our 5%. Note that artists and luthiers may not be the ones who pocket all these benefits, but the idea is that all this money is going somewhere.
But these 5% will want entertainment too, so they will hire second class artists and musicians. Themselves will pay for more modest entertainers. It will form a pyramid, like always, except it will be driven more by pleasure than necessities.
And it doesn't stop at artists and musicians. They are also ready to pay huge amounts of money for their health and maybe a few crazy thing like space tourism. All these give work to researchers and the high-tech industry.