Current tax regimes are no longer sufficient to cover state expenditures because they are no longer suitable for our times. In the last two decades, the globalization of the economy and the development of the Internet have completely changed the situation.
Countries are now competing with each other to attract multinationals, so the corporate tax is disappearing. The better-off now succeed in removing a major part of their wealth from the tax authorities, either in the dubious circuit of tax havens or in seemingly more respectable charitable foundations. The exponential growth of electronic commerce also deprives governments of large sales taxes.