What is the reason why Western countries have ballooning deficits? Is it because of the welfare state, or is it because they just had to spend a lot of money propping up failing banks?
The US and other Western countries ran up deficits by creating entitlement programs (and in the US's case, massive military outlays) that they did not raise enough taxes or cut other programs to pay for.
In the US's case, we actually took a budget surplus and turned it into major deficit by passing two major tax cuts, then our economy cratered in ~2001 and our military spending climbed unabated. We seem to be allergic to tax hikes since the mid 90's.
There's lots of talk about unsustainable welfare systems and cultures of dependency. I'm just wondering who are the major recipients of said welfare and are dependent on the state to such an extent that austerity is now supposedly necessary despite the global economic slowdown.
The biggest beneficiaries of the government welfare are the elderly. However, it is politically easier in the US to go after 'welfare queens' rather than talk about serious reform for Social Security and Medicare. Unfortunately, we do have one party that wants to reform Social Security but would do so by privatizing it and essentially turn it over to Wall Street because the stock markets aren't volatile or anything.
Austerity could help deficits if the economy is also growing. If it isn't growing, you do more harm to the economy by raising taxes and cutting spending than any benefit you would get back on the budgetary side. Hurt the economy enough through austerity, and you'll end up hurting the budget as well as tax reciepts dry up.
People who clambor for austerity in the US usually don't know how the economy works or are rich and wish to see their taxes lower. I could be wrong on this as I am obviously biased, but that's how it seems to me.
And, as a bonus question, why do the rich need tax breaks but low and middle-income groups don't need tax breaks and benefits?
Trickle down economics. The theory is that the rich create jobs and cutting their taxes mean they will hire more people. In reality, we have, what, 30 years of proof that this isn't so? They only horde the money, they don't create anything with it.
What is especially insidious are right-wing plans to somehow cut the deficit by cutting taxes and spending (but mostly taxes) and also give proportionally bigger tax cuts to the rich than to the poor. They only talk about this in the vaguest terms, I guess to fool people, but if you think about say, Romney/Ryan's budget for 10 minutes, it's hard not to reach this conclusion.