The concept of government managing money for the people is founded upon the concept that others will be paying more money than you.
If you really want something to be built - i.e, a road - you could easily pay someone to have it built. You could also contribute to a pool of money that will have it built, which is exactly what the government does.
However, you don't do that. You instead vote to impose a law on others that force THEM to do the same thing as well. The entire concept is founded upon your belief that you will be able to take resources from others, to get what YOU want, instead of getting what YOU want yourself.