do-nothing

nouns

person who does no work
"a lazy bum"
bum, do-nothing, idler, layabout, loafer

adjectives

characterized by inability or unwillingness to work toward a goal or assume responsibility
"a do-nothing government"
do-nothing
is similar to
showing lack of care for consequences
"behaved like an irresponsible idiot"; "hasty and irresponsible action"
irresponsible