Appropriate sense of proportion

Appropriate sense of proportion

I worked up this morning with a few old songs ringing in my head. The first one goes like this,

'If you want it, here it is come and get it.
But you gotta hurry costs it may not last.'

The second one was by the rock group the Monkeys, and it goes like this,

'Money, money, money.
Must be money.
It's a mad, mad world.'

How could one explain why people can