Everything we get, outside of the free gifts of nature, must in some way be paid for. The world is full of so- called economists who in turn are full of schemes for getting something for nothing. They tell us that the government can spend and spend without taxing at all; that it can continue to pile up debt without ever paying it off, because "we owe it to ourselves.
For every dollar that is spent on the (boondoggle) bridge a dollar will be taken away from taxpayers. If the bridge costs $1,000,000 the taxpayers will lose $1,000, 000. They will have that much taken away from them which they would otherwise have spent on the things they needed most.