VAT taxes i suppose that added more expanditure to poor people until the goverment added this type of tax to all of peoole. there is no diffrent between rich and poor people in this type of taxes so goverments take money from poor people pockets and spend their money for relaxation and services for the rich people .
Yes. Govt has increased the tax base of GST. Much more revenue growth comes to govt. If its utilization is for the services of it's people then the country will develop.
Since your question has not specified the government, the previous vat regime vis a vis the current vat regime, it is difficult to contribute to the responses to your question.