I'm probably 10 days too late for this discussion but here's my two bobs worth.
There's certainly plenty of room for hundreds of small Irish breweries - like there was until 100 years ago. I would think that most small breweries currently have supply problems, rather than demand problems.
If beer buying patterns are going to solve economic crisis, which I believe is a very realistic option, the key is to get a large portion of the population to get a bit nationalistic/ecofriendly about their buying habits. Lots of people (under 40s) are open to changing taste habits - (just look at the wine revolution of the naughties). I've heard many, many conversations like "Have you tried that xxx Belgium beer in yyyy cheap grocery store". Punters are exploring the cheap foreign beers available in the off licence, but they don't seem to think of this option in their 100 year old traditional pub.
Here's an interesting example. I started my beer appreciation in the 1980s in Australia with fosters when everyone was drinking it. Within one week of that company floating on the international stock market, I went to my local pub and was chastised for ordering that foreign shite beer. I looked around and everyone in the pub had changed brands overnight. I'm not sure what exactly provoked the disgust people felt that the national icon company had sold out. I always supposed it was a talk-back radio show, or such.
Anyways, never before have Irish people been so aware that every persons daily spending choices control the fate of the countries economy.
Perhaps a marketing loyalty campaign like a non-profit association administering a logo on beer labels that indicates the product is 100% Irish with profits remaining locally. The logo could have a slogan like "Drink for Eire" with a cartoon of a fat freckly Irish head on it. This buy local logo idea has been used for food and other goods in many countries.
Its amazing to imagine that one simple cultural change could catapult Ireland's fate from long haul recession to back on level track in a few years (without austerity measures). We're one of the biggest beer drinking nations in the world and 99.9% of the profits are distributed internationally. The recession busting opportunities are astounding. How many billion Euro would remain local if 50% beer was bought from Irish owned companies. This target is under current levels in America, Australia, Canada, Germany, most of Europe - even Ireland 30 years ago. Of course this would require diabolical growth levels from all Irish microbreweries.
If people only knew they could drink their way out of unemployment, emigration, loss of sovereignty, and tax increases they would probably be only too happy to oblige.