The tax is levied on the businesses who collect it on behalf of the government, it is a direct function of the amount of the invoice. So if you charge your customer less for your goods or services the tax paid goes down. VAT is short for 'Value Added Tax', in other words that which a business produces. But if your business provides no value then magically you still have to charge VAT, so clearly there is a relationship with turnover.

By your logic you could reason that eventually all tax is paid by consumers because they pay the companies for the products and that includes corporate income tax and so on but whenever sales tax is low you will find that companies are more than happy to absorb the surplus as profits.

VAT is the closest governments get to taxing businesses directly on their revenue streams.