wasteful or extravagant
prodigal - wasteful
The word ‘prodigal’ is most commonly used to describe somebody who is recklessly lavish when it comes to spending money. However, it can also be used in relation to time, energy, food, etc. The term also implies that such habits will quickly lead to a negative outcome and the exhaustion of whatever resource is being misused.
He’s living a prodigal lifestyle at the moment. If he’s not careful, he could end up destitute.
Jane should have been fired for being so prodigal with company funds. It was highly irresponsible behaviour.
The government’s prodigality must be checked or it could lead to the country’s ruin.