This is a very common misunderstanding and fallacy of political economics. Look at what savings means. When someone saves money, they don't put it under the matrass, they mainly put it in a savings account or they may directly invest it. Money put into a savings account is loaned by a bank to either an individual or a company, who use the funds to purchase something. So it is not correct to say that savings leads to less spending. What savings means is that the saver allows someone else to do the spending for them.
Many shops and businesses will have to fold, this is going to be inevitable. Too many businesses were set up during the artificial boom, i.e. there was too much investment into businesses that would not be able to be sustainable beyond the boom. This is the unfortunate side effect of the artificially created boom bust cycle. There is no escape from it.
Many businesses only came into existence because too many people spent too much money that they hadn't yet earned. Once businesses fold then the resources and capital tied up in them will be made available for new businesses that are better set up to deal with current conditions. This is a good thing for the economy, as wasteful and inefficient operations are wound down and make room for new entrants.
This is key. Ireland needs others to do the spending so that debt within the country can be reduced and investments in new businesses increased. As I said before, wealth comes from producing more than you spend, and the more money is saved, the more capital is available for investment in production which increases income and wealth.
How about cutting back on all non-frontline services? When people mention cut backs they always assume this means a hospital closing. How about closing down 20 of the 28 (maybe more) motor tax offices? Or getting rid of some of the totally useless government departments and their budgets, e.g. heritage and local government, enterprise, culture, sport. None of these are crucial to the running of the country and while the imbeciles in government cannot even get the basics right (education, law enforcement, health) they should not be wasting resources on them.