An extremely tedious book. Mattick is known as a council communist, so I thought he might be original and open-minded. For interesting council communism one should turn to Pannekoek or Socialisme ou Barbarie, however; here Mattick simply re-states the most orthodox Marxist economic ideas, in less clear terms than Marx himself, using the Marxist style of argumentation where Marx is right simply because he is Marx. Using the labor theory of value, Mattick reiterates the basic Marxist idea that capitalism's central problem is a rising "organic composition" of capital and resultant decline of profitability. The thing is, the labor theory of value, while interesting as a philosophical reflection on abstraction or reification, is patently false, on logical and empirical grounds, as an explanation for how actual economies function. The economy operates in terms of prices, not values. To his credit, Mattick admits this, but clings to the idea that an abstract value model somehow "ultimately" explains the "totality" of capitalism, even if it doesn't explain any of the concrete events and trends in the actually observable economy. (For his part, Marx obviously thought that values and prices would converge.)
Even today Marxists are rehearsing the arguments in this book; the quasi-Keynesian "underconsumptionists" of Monthly Review are under attack by Kliman the "overproductionist." Mattick is solidly overproductionist - again, the central idea being that the quantity of means of production (i.e. the "value" of physical plant) is too large relative to exploitable labor, the only source of profit if you believe in something called "value," leading to a decline in the rate of profit, which is supposed to lead to disastrous consequences. (Although it’s become a real obsession for Marxists, in the part of Capital published in his lifetime Marx gives little emphasis to a falling rate of profit, instead stressing unemployment and concentration of capital.) Mattick (and now Kliman) thinks it's more "radical" to say that capitalism can’t be reformed because of the law of value, and on the basis of some questionable assumptions, argues that government intervention is useless. Of course, capitalism has undergone reforms, and the real question is whether we even desire a reformed capitalism. In any case, all sides can marshal statistics in their support - leading one to believe that a strictly quantifiable and "scientific" treatment of a closed "economic" space is quite impossible.
What's interesting is that Marx and Marxists obviously came to more or less correct conclusions on the basis of faulty premises. But Keynes basically came to the same (fairly obvious and palpable) conclusions: that a capitalist economy operates for the profit of a specific class of non-laborers, that it leads to periodic crises, unemployment, stagnation, declining profit rates, reduced investment and increased speculation, etc. What's characteristic of Marxism is the unfounded confidence that some "secret truth" had been uncovered by Marx in value theory that exhaustively explains all of this and "objectively" proves that the system can't really function. It's odd that even "libertarian" Marxists can't see the authoritarian character, not of Marxist statism (which is bad enough), but of Marx's "scientific" economic theory itself and the centrality he gives to it.
Is there a "structural" reason the Keynesian experiment was short-lived, leading to neo-liberalism and the current crisis? The question seems complex and undecided. Partly it may have to do with profit rates and excessive plant. But the labor theory of value isn't the place to look for answers; more mundane phenomena like international competition and class struggle (something which, curiously enough, doesn't really factor into Marx's Capital) are probably the independent variables.