You need to get REAL.Nobody speaks Irish(A few thousand claim they have a few words).
As per the 2011 census of Ireland :
Of the 1.77 million who indicated they could speak Irish,77,185 said they speak it daily outside the education system. A further 110,642 said they spoke it weekly, while 613,236 said they spoke it less often. One in four said they never spoke Irish. The numbers speaking Irish on a daily basis outside the education system increased by 5,037 persons since 2006 from 72,148 to 77,185; the numbers speaking weekly showed an increase of 7,781 persons, while those speaking Irish less often showed the largest increase of 27,139
I think you'll agree that that is certainly a bit more than 'a few thousand'. A lot of those increases can be attributed to various different things, gaelscoileanna for instance but certainly TG4 represents a large contribution also. TG4 is a successful attempt to increase the usage of Irish properly, unlike the failed attempts of the past where Peig was learned by rote and grammar was drummed into students ad nauseum.
Frankly there are other aspects of the national broadcaster that could be cut without a loss of a genuine public service like TG4.