The fact that people need stuff doesn't mean they have a demand for it.
Demand has two principles:
The desire to buy the product
The means to purchase the product
Demand doesn't exist if the person doesn't have the ability to pay for it, no matter how much they want it.
When people don't have access to credit, they don't have the means to pay for things. When these people, Americans, Brits, Canadians, anyone, can't buy things, the companies that make these things cut jobs. When people lose their jobs, the economy begins to deteriorate. This then affects the overseas spending, because trade is reduced, the government doesn't have money, the companies don't have money, everybody loses.
A global recession is very real and happening right now. In every crisis comes opportunity, but this crisis seems to be just that, a crisis. You can't capitalize on anything right now, because people don't have access to the credit they need to start making the major transactions that would get the economy rolling again.
This is partially the bank's fault. The banks in the US went from extremes: A loose-money policy, in which credit is easily available (Far too much so in the case of the US, giving out 400 thousand dollar mortgages to people without any ability to pay it off), to a Tight-money policy, in which the banks have the money stuffed in a vice grip, and nobody can get to it, regardless of credit ratings.
In order for begin the revitalization, credit needs to be available. Classical (Keynesian) Economics tells us that increased spending and decreased taxation is the method of ending a recession. And Keynes was right, period. Where do you think this money will go? Not to the taxpayers, that would be stupid. Giving them free money will only do so good, their spending will go to waste. No, instead, put the money toward public works, bridges, roads, all kinds of projects sponsored by the government that both creates wages, employment, and gets something useful done. It employs the people making the raw materials, the steel mills for the bridges, etc, employs the construction workers, it gets the economy going again.
That's where this stimulus package is going. You don't stimulate the economy by handing out a tax rebate. You buy up as much of the toxic debt as you can (Buying up the bad investments in the subprime mortgages) so that the banks don't go under, and then put the rest toward creating jobs.
Economics. It tells you these things.