Labour disability
Unsuitable labour, that is what people are "disabled" for. Unsuitable labour is the only cause of labour disability we can remove. Here's how:
Colourcash is a "game" which is in search for balance. It's of no use whatsoever to squeeze the maximum out of workers. The "maximum" reveals itself later as a deficit. The string can't always be strung tight. Balance. When you find balance, you don't go from extreme to extreme, like a drunken ballet dancer.