The government builds NOTHING, it produces NOTHING, it only SPENDS your money to have someone else do the work. Construction workers build the roads, not government employees. The government only pays others to do things, and in getting that money to pay for it, it siphons off a large percentage to pay for its own operation as the middle man. States could certainly work together to create interstates, we don't NEED the feds to do this.
Imo Government should only protect its citizens from other nations. Government should also enforce lawful contracts, and thirdly and most importantly Government must secure the rights and freedoms of individual citizens.
As Thomas Paine put it "Rights are not gifts from one man to another, nor from one class of men to another… It is impossible to discover any origin of rights otherwise than in the origin of man; it consequently follows that rights appertain to man in right of his existence, and must therefore be equal to every man.
Also Frederick Bastiat in his book The Law stated "Life, liberty, and property do not exist because men have made laws. On the contrary, it was the fact that life, liberty, and property existed beforehand that caused men to make laws in the first place."
In the federalist papers (Which every US citizen should read) James Madison said "If men were angels, no government would be necessary. If angels were to govern men, neither external nor internal controls on government would be necessary."