Are you being deliberately dense?
The point is, you don't have buy the alpha.
You enter a topic. The man who started the topic complains about the pricing tag on the alpha (and yes, he seems to be well aware of the other available options). You tell him he has an option not to buy the alpha (or, continuing this line of reasoning, not buy anything at all), because in the end he, you, me and my dog will get the same finished game. Well, to correct you, in the end we will all die and nothing of this will matter anyway.
From where I sit, you're the one who is being dense, and considerably at that.
You can't just hire more guys and expect a project to automagically go quicker, it just doesn't work like that
All the places I worked at were severely understaffed, including the multinational conglomerate company I'm working for at the moment and the huge international organisation I've worked for previously. More money means being less understaffed, which in turn means a raise in quality. That's how it works with programmers.
Alpha-testers, however, is entirely another thing, yes.