thriftless

from WordNet (r) 3.0 (2006)

thriftless
    adj 1: careless of the future

from The Collaborative International Dictionary of English v.0.48

Thriftless \Thrift"less\, a.
   Without thrift; not prudent or prosperous in money affairs.
   -- {Thrift"less*ly}, adv. -- {Thrift"less*ness}, n.
   [1913 Webster]