The question 'is' (daj tu 'remains', wtedy nie bedziesz mial 2 razy 'is'): Is it really necessary to 'back up' (tutaj 'support') high culture? I am sure it 'it' (co to - tutaj IS).
To begin with, people who live day to day and 'cound' (ortog) every penny, 'don't consider' (nie, nie tak, bo tego nawet nie masz na mysli, - o czy6m myslisz to ...DO NOT HAVE TIME 'about' (niepotr) TO CONSIDER high culture. This form of entertainment is 'cesondary' (ortog) for them. I think everybody should have equal chances to enjoy 'it' (nie wiem dokladnie do czego to 'it' sie odnosi). If 'it was paid extra' (cos tu nie tak - popraw to) by the state, 'this community' (nie napisales kto nalezy do 'this community') would visit 'in' (nie - to jest kalka z polskiego - THE theatre or THE opera.
I'd like to place AN emphasis on that IT IS in the government'S interest 'is' (niepotr) 'taking' TO TAKE care of citizens' culture level. This determinant 'certificates' (nie rozumiem uzycia tego slowa tutaj) about THE (no i co sie dzieje z uzyciem 'the' - dlaczego tego nie uzywasz!!) whole country, which consists of 'citizenship' (zle slowo-) , 'which' (jak mowimy o ludziach to WHO) are educated 'niter alia' (prosze pisac to bezblednie) by high culture.
Assuming that 'prices' tickets' (zla kol slow - TICKET PRICES may be reduced thanks to sponsoring, THE turnout interested in high culture may 'be bigger' (napisz INCREASE). This operation 'guarantes' (ortog) success.
What is more, sponsoring by the state gives 'ab' (ortog) opportunity to evolve
'others' OTHER formS of art and 'better preparations' (tego nie rozumiem - o co tu chodzi).
I think 'I've proved' (cos nie lubie tego 'proved') that IT is really A significant undertaking, which should be put into practice. Culture moulds our personality and it is also AN absorbing way of exploitING OUR free time. High culture is worthy 'ro' (ortog) be sponsored.