I am sure lots of people don't actually understand false economy, and that taxes paid should be spent wisely for the sake of society.
I think the level of state involvement in raising quite high taxes but misspending them and having a false economy approach is bonkers
How many of the PP including OP are the same people on other threads who bemoan the state of society, worry and feel sad (rightly) about the decline of many towns, cities, and villages, rising homelessness, drug problems, crime issues, 'feral', children, failing schools, 'sink estates', difficulty accessing their GPs, NHS waiting lists, potholes, expensive or poor provision of public transport, ineffective CMS enforcement, and other social problems?
Unless money is invested in good public services, housing, social care, the NHS, supportive benefits system, and education and training opportunities, society will continue to decline, and even if you have a lack of empathy, it still affects everybody including you.
Money can only insulate you from the problems to an extent. Unless you live a completely cut off hermit life and never ever stray beyond your tiny hamlet or village. Isolated from life (and never needing hospital, or other facilities).
With social problems including disadvantaged or 'problematic' families, there's a need to break the cycle. Poorly funding support services, and failing to provide educational and training opportunities, is false economy.
With rising homelessness and a rising benefits bill, not funding social homes and the NHS is false economy.
The issue really is, apart from actual money, the funding needs to be better spent.
Tackle mismanagement and ensure accountability especially if the public service is a contracted out private company.
Provide better trained staff and crack down on any bullying culture in the company/service. This affects staff performance, causes high staff turnover, and consequently a crap and failing service. Which wastes public money.
(I do agree that misspent money is bonkers. For example, funding mental health counselling schemes for social problems instead of tackling the cause. Which is a need for social homes, better wages and supportive benefits system, encouraging employers to provide training instead of overlooking unemployed job seekers for lack of experience, and cutting NHS wait lists. All these things affect mental health but people need practical solutions rather than counselling in many cases).