People see a 3% return and think, "Well, they aren't losing money so there is no reason they can't just keep doing business as usual." What this idea is missing is that the investors in a company aren't choosing between "keep my money in this company" and "sit on the cash", they are choosing between "keep my money in this company" and "invest my money somewhere else"
In other words, you aren't just looking at direct returns on an investment, you also have to think of the OPPORTUNITY COST of the investment. By keeping their money invested in a business making 3% returns, they can't invest that money somewhere else.
It's this competition that leads to prosperity, the alternative is central planning which leads to poverty.