Bear in mind that the potential for companies with high returns on capital to reinvest a lot of capital are limited, since they tend not be be very capital intensive (e.g. Nestle Malaysia and Dutch Lady).
Furthermore, the market will probably be correctly pricing such gems which are capable of obtaining high returns over time, meaning we must wait for the right moment to acquire them at a reasonable price, because they are rarely gong to come cheap.
If some of these companies with high returns on capital in attractive sectors also offer a certain amount of growth, facilitating reinvestment of capital, then we are looking at a gem, with the added benefit of being coherent with our long term investment philosophy.
If a company can reinvest with a 20% return on investment over the next 20 years and we are able to buy the stock at a reasonable price, then the return on our investment will be close to this annual 20% over 20 years.