thriftless
Concise Oxford English Dictionary © 2008 Oxford University Press:
thriftless/ˈθrɪftlɪs/
▶adjective spending money in an extravagant and wasteful way.
– derivatives
thriftlessly adverb,
thriftlessness noun.
thriftlessly adverb,
thriftlessness noun.
'thriftless' also found in these Oxford entries:

