What is the ruling on giving money to someone to pay my taxes to the government, in exchange for me returning to him a larger amount than he paid?

If a person lends the applicant the tax amount and pays it on their behalf, then the applicant repays the loan with an agreed-upon increase in the contract or by mutual understanding, then this is usury (riba), which is forbidden by consensus, because every loan stipulating an increase is unlawful.