to be wasteful with sth
1system — noun 1 set of ideas/rules for organizing sth ADJECTIVE ▪ current, existing ▪ We re looking to replace the existing system. ▪ modern, new ▪ old fashioned …
2inefficiency — inefficient in‧ef‧fi‧cient [ˌɪnˈfɪʆnt◂] adjective producing goods or working in a way that uses more time, money etc than necessary: • the assumption that the public sector is wasteful, inefficient and unproductive inefficiently adverb… …
