New renewable energy installations.

Research into vaccines.

Malaria distribution.

Higher education endowments.

Heck, just paying the salaries of people working in those fields. Sure, spending money stimulates the economy so I wouldn't go so far as to say it's totally wasted, it's definitely being put to a much better use than just sitting in someone's bank account. But it could be put to a lot better uses. The software engineers could be developing a new program for balancing energy loads, or managing the maintenance of wind turbine fields. The hardware engineers could be optimizing a better autoclave or building a machine that automatically dispenses medicine when fed a script. The PMs could be managing a team distributing aid in Ukraine or designing a new blood drive initiative. Jobs that have positive societal impact, instead of - at best - neutral societal impact.