Thats not how money, wealth, or economies work. We dont "transfer our wealth to billionairs", and in general buying things does not transfer wealth.
Wealth is generated, not a fixed value. When you buy things that you need (has utility) then wealth is generated, not transfered. When you buy something that does not provide utility wealth is destroyed (though keep in mind simply providing happiness can be a utility). Most billionairs are generating wealth, not having wealth transfered to them. Others are destroying wealth if the products they produce are harmful (for example cigerettes). But the idea wealth is simply moved around is simply not true.