We still need someone to build roads and make sure the water stays clean. Arguably, we also need an education system, an oversight of healthcare, a social safety net system and many other things. Working in these capacities helps society in general, and everyday citizens to have better lives.
There are way too many ineffective people in bloated bureaucratic stasis managing these things at the moment, and very much poor and overpriced execution which costs all of us in terms of services received and increased tax burden.
Helping to improve the efficiency and effectiveness of these socially important tasks is a very worthwhile use of work time and is not "working for criminals", as the recipients of this work are the citizens of the country.