I bet you wouldn't. You might start off that way, but then you'd think "Hmm, if I do an extra few weeks I can buy a nicer car / a fancy new camera / a better c

I bet you wouldn't. You might start off that way, but then you'd think "Hmm, if I do an extra few weeks I can buy a nicer car / a fancy new camera / a better computer / go on an expensive holiday / save up more money in case I get too old or too sick to work", and then after a few iterations of that it would be "Hmm, if I work an extra month every year then I can afford a bigger house" a few times. And, since this is consulting income we're talking about, every now and then it would be "Whoa, it was scary not being able to find any work for six months. Just as well I had a little money saved. I'd better work extra hard for a little while to build up my reserves again". Of course, you might be different. Some people are. But when you have the option of getting a lot more money for a modest amount of extra work, it's really hard not to do it.