That is an extremely vague answer. You see waste where? Give me an actual example. Lots of people love to talk about government waste and repeat apocryphal stories about $1k hammers and $25k toilets; few people have ever looked at a real government budget or tried to engage with it in any detail. Give me a program, or department, or whatever that you think is a good example of waste. I know you're a journalist and have looked into these things before, at least at the local level.
Is government "efficient" in spending tax dollars? It's an impossible question to answer. Some departments and agencies and programs and states and cities and counties are better at it than others, for all sorts of reasons. Their efficiency is and should be questioned, and work done to attempt to improve it as much as possible. But much of the criticism that public institutions take is over things they're doing that can't be as efficient as private industry because the goal is to provide a service, not to make a profit. Public schools, unlike private schools, have to take every kid in their district, no matter how difficult they are to educate. The USPS, unlike UPS or FedEx, has to deliver mail to every official address in the country, no matter how remote it is, and they can't charge extra because the site is a cabin in the mountains. DOT has to build and maintain every public road, no matter how many people use it or how environmental factors may make it difficult to do so.
No one has ever claimed that government is perfect. There is and should be oversight and accountability over government spending. Governments are made up of people; those people have varying levels of competence and motivation and energy. But the same is true of private industry, and often accusations of government spending are really boiled down to cost overruns by the private contractors they're constantly working with, not because of anything the "government" did.