Keynes stated that due to the massive unemployment, consumer spending was insufficient to encourage businessmen to build new factories. The government spending would temporarily replace the consumer spending. As the economy grew, nearing full employment and pressure was placed on prices causing them to rise, the government could now run a surplus budget. In other words, taxes could be raised and government spending could be cut. The cause effect steps of this policy are as follows.
Government pursues a deficit budget lowering taxes.
Lowering taxes would cause people to have more disposable income. This increased disposable income would allow people to increase their consumer spending. Consumers would now purchase products causing orders for those products to increase. Producers would fill those orders calling people back to work. After a while the economy would be near full employment.