Supply side economics argues that tax cuts foster individual wealth and, by extension, national wealth. Lower taxes means more money in your pocket and more incentive to earn that next dollar. More money in your pocket = more disposable income = more spending on the extras = more goods and services sold = higher employment and corporate profitability = positive domino effect that generates tremendous economic benefits.
Does anyone disagree with the benefits of tax cuts?
Now, here's the bonus. Greater economic growth = more money in government coffers. 25% of something is better than 50% of nothing. So, lower taxes = higher government revenue.
Notice, it's higher government revenue, not lower deficits. Congress can still, and usually does, decide to spend more money and create large deficits in spite of the extra revenue. Those deficits are not the fault of tax cuts, but of spending increases.
Let's say the government brings in $100, but spends $110 - a deficit of $10.
Supply side economics is implemented and the result is goverment revenues of $125. But, the government spends $150, producing a deficit of $25.
Who's fault is the higher deficits? I'm going to have to go out on a limb and say it's the fault of an irresponsible Congress and their unconsitutional spending.
With that said, I'm not a supply sider. It's a incomplete economic plan,
IMO, because it allows for greater government spending (up to a point). I believe spending should only done on items justified under the Constitution.
Me = low taxes and low government spending
Supply siders = low taxes and relatively high spending
Lefties = high taxes and high spending