Free markets tailor supply to demand. If there is a lot of demand for pure science, there will be a lot undertaken. Unis and philantropic individuals could fund it (and do), as well as the scientists themselves. Pure science cannot go on forever without practical, nor visa versa. Anyway, the two are not all that different realy. Somehtings may at first appear to be entirely theoretical, but then have dramatic consequences. DNA- who forsore that it would spawn a massive pharmacuitical industry? Free markets let individuals do exactly what they want with their knowledge, their resources and their labour, with no regard to basically arbitrary rules which only cause ineffiency.