I dont pay for alpha games. Sell me something when its done. The only kickstarters I pay for are for charities or people doing things for fun (such as Cataclym DDA). Companies love the kickstarter funding source because its free money. In the past companies got funding from 3 sources (I have an MBA, its in the textbooks), your own money, loans, or venture capital investments.
Venture Capital investments require equity in the company which is part ownership. Kickstarter allows vendors to go hat in hand to potential companies and say 'please give us money to make you a game, we will make it uber cool'. This is not an 'investment', its a handout. Wasteland 2 raised several million dollars this way. There isn't any legal obligation for them to spend it wisely or pay appropriate salaries. The owners of the company could pay themselves very large salaries and make mistakes spending the money. The people who 'fund' kickstarters have no write to a refund.
Paying $60 for an 'alpha' game is similiar to kickstarter. You are paying early so that people who do not want to invest their own money, get a loan, or get investors can develop a product on your dime. This is essentially free money.
If they have a marketable product than they can go look for venture capital investors and give up equity in their company. This is typically a last resort, because they are not giving up a fixed percentage. So if the game is a huge success the venture capitalists make more money. Unlike people who pay for 'alpha games' or kickstarters they expect a return.
Just look at the 'towns' abandonment (alpha game where the developers got bored and took people's money) or the various kickstarters that never get done. Show me a finished product and then Ill decide if Im going to buy. The threat of 'we will charge you more' doesn't work on me. You will charge me less because I won't buy your product. Besides eventually all games get marked down as they age anyway. I am patient and can wait before spending my money.