Did you pay cash for your house, or did you borrow to complete the purchase? When you finance the purchase or construction of an asset which increases in value over time - like a bridge, or a water treatment plant, it is a financially WISE thing to do as to increases your net worth and provides you with something you need.
In the case of the water treatment plant, improving the health of the community through cleaner air or water, reduces medical costs across the entire area being serviced by the facility, as well as lifting property values. If you know the city has been having problems with frequent "boil water" alerts, and people have been made sick by the drinking water, how inclined would you be to purchase a home in that community?
If you borrow money to blow and spend it on a trip around the world, and come home with your pockets empty, you've increased your debt, and decreased your equity and net worth. But if you borrow money and put an addition on your home, your home increases in value, probably more than you spent on the addition, and you've improved both your living situation, and your net worth.
Tax cuts are flashy and people love to get them, but they love to go travelling too. But investing in your communities and your people, will make everything about your country better.